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authorOvidiu Panait <ovidiu.panait@windriver.com>2020-05-15 15:11:06 +0300
committerRichard Purdie <richard.purdie@linuxfoundation.org>2020-05-18 06:33:36 +0100
commit17488d3e1df980d3e1c59c8698a57303f788944a (patch)
tree2d3c87a07b8692ae1a1f645ed0e81f7c166f435f
parentb3d1d71bab2aaeb73261b6bc08b77549d7a6bb7f (diff)
downloadpoky-17488d3e1df980d3e1c59c8698a57303f788944a.tar.gz
lttng-modules: Fix "LTTng: vmalloc_sync_all symbol lookup failed" warnings
Fix the following warnings introduced after backporting linux kernel commit [1] to stable branches: # lttng create session ... [ 483.242037] LTTng: vmalloc_sync_all symbol lookup failed. [ 483.257056] Page fault handler and NMI tracing might trigger faults. ... These patches should be dropped when a new stable 12.0 release is available. [1] https://github.com/torvalds/linux/commit/763802b53a427ed3cbd419dbba255c414fdd9e7c (From OE-Core rev: f2e48f9127aee949364696315e3adc861aba1dd6) Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat
-rw-r--r--meta/recipes-kernel/lttng/lttng-modules/0001-Update-for-kernel-5.7-use-vmalloc_sync_mappings-on-k.patch853
-rw-r--r--meta/recipes-kernel/lttng/lttng-modules/0002-Fix-missing-wrapper-rename-to-wrapper_vmalloc_sync_m.patch32
-rw-r--r--meta/recipes-kernel/lttng/lttng-modules/0003-Fix-Use-vmalloc_sync_mappings-on-kernel-5.6-as-well.patch88
-rw-r--r--meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch67
-rw-r--r--meta/recipes-kernel/lttng/lttng-modules_2.12.0.bb4
5 files changed, 1044 insertions, 0 deletions
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0001-Update-for-kernel-5.7-use-vmalloc_sync_mappings-on-k.patch b/meta/recipes-kernel/lttng/lttng-modules/0001-Update-for-kernel-5.7-use-vmalloc_sync_mappings-on-k.patch
new file mode 100644
index 0000000000..58f4d29193
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0001-Update-for-kernel-5.7-use-vmalloc_sync_mappings-on-k.patch
@@ -0,0 +1,853 @@
1From a2cc0e06330e55eefe668f7d6370de6d3177a907 Mon Sep 17 00:00:00 2001
2From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
3Date: Tue, 5 May 2020 13:38:31 -0400
4Subject: [PATCH] Update for kernel 5.7: use vmalloc_sync_mappings on kernels
5 >= 5.7
6
7Upstream-Status: Backport [https://github.com/lttng/lttng-modules/commit/da0fcb1497ff2437407883647a8a0bba12bd0f91]
8
9Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
10Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
11---
12 lib/ringbuffer/ring_buffer_backend.c | 4 +--
13 lttng-abi.c | 4 +--
14 lttng-context-callstack.c | 2 +-
15 lttng-context-cgroup-ns.c | 2 +-
16 lttng-context-cpu-id.c | 2 +-
17 lttng-context-egid.c | 2 +-
18 lttng-context-euid.c | 2 +-
19 lttng-context-gid.c | 2 +-
20 lttng-context-hostname.c | 2 +-
21 lttng-context-interruptible.c | 2 +-
22 lttng-context-ipc-ns.c | 2 +-
23 lttng-context-migratable.c | 2 +-
24 lttng-context-mnt-ns.c | 2 +-
25 lttng-context-need-reschedule.c | 2 +-
26 lttng-context-net-ns.c | 2 +-
27 lttng-context-nice.c | 2 +-
28 lttng-context-perf-counters.c | 2 +-
29 lttng-context-pid-ns.c | 2 +-
30 lttng-context-pid.c | 2 +-
31 lttng-context-ppid.c | 2 +-
32 lttng-context-preemptible.c | 2 +-
33 lttng-context-prio.c | 2 +-
34 lttng-context-procname.c | 2 +-
35 lttng-context-sgid.c | 2 +-
36 lttng-context-suid.c | 2 +-
37 lttng-context-tid.c | 2 +-
38 lttng-context-uid.c | 2 +-
39 lttng-context-user-ns.c | 2 +-
40 lttng-context-uts-ns.c | 2 +-
41 lttng-context-vegid.c | 2 +-
42 lttng-context-veuid.c | 2 +-
43 lttng-context-vgid.c | 2 +-
44 lttng-context-vpid.c | 2 +-
45 lttng-context-vppid.c | 2 +-
46 lttng-context-vsgid.c | 2 +-
47 lttng-context-vsuid.c | 2 +-
48 lttng-context-vtid.c | 2 +-
49 lttng-context-vuid.c | 2 +-
50 lttng-context.c | 2 +-
51 lttng-events.c | 10 +++---
52 lttng-ring-buffer-client.h | 4 +--
53 lttng-ring-buffer-metadata-client.h | 4 +--
54 lttng-syscalls.c | 2 +-
55 probes/lttng-kprobes.c | 2 +-
56 probes/lttng-kretprobes.c | 2 +-
57 probes/lttng-tracepoint-event-impl.h | 4 +--
58 probes/lttng-uprobes.c | 2 +-
59 probes/lttng.c | 2 +-
60 tests/probes/lttng-test.c | 2 +-
61 wrapper/vmalloc.h | 49 ++++++++++++++++++++++++++--
62 50 files changed, 104 insertions(+), 61 deletions(-)
63
64diff --git a/lib/ringbuffer/ring_buffer_backend.c b/lib/ringbuffer/ring_buffer_backend.c
65index d4bec25..d232b7f 100644
66--- a/lib/ringbuffer/ring_buffer_backend.c
67+++ b/lib/ringbuffer/ring_buffer_backend.c
68@@ -17,7 +17,7 @@
69 #include <linux/vmalloc.h>
70
71 #include <wrapper/mm.h>
72-#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
73+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
74 #include <wrapper/ringbuffer/config.h>
75 #include <wrapper/ringbuffer/backend.h>
76 #include <wrapper/ringbuffer/frontend.h>
77@@ -156,7 +156,7 @@ int lib_ring_buffer_backend_allocate(const struct lib_ring_buffer_config *config
78 * If kmalloc ever uses vmalloc underneath, make sure the buffer pages
79 * will not fault.
80 */
81- wrapper_vmalloc_sync_all();
82+ wrapper_vmalloc_sync_mappings();
83 wrapper_clear_current_oom_origin();
84 vfree(pages);
85 return 0;
86diff --git a/lttng-abi.c b/lttng-abi.c
87index b63e376..826ecab 100644
88--- a/lttng-abi.c
89+++ b/lttng-abi.c
90@@ -30,7 +30,7 @@
91 #include <linux/uaccess.h>
92 #include <linux/slab.h>
93 #include <linux/err.h>
94-#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
95+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
96 #include <wrapper/ringbuffer/vfs.h>
97 #include <wrapper/ringbuffer/backend.h>
98 #include <wrapper/ringbuffer/frontend.h>
99@@ -1938,7 +1938,7 @@ int __init lttng_abi_init(void)
100 {
101 int ret = 0;
102
103- wrapper_vmalloc_sync_all();
104+ wrapper_vmalloc_sync_mappings();
105 lttng_clock_ref();
106
107 ret = lttng_tp_mempool_init();
108diff --git a/lttng-context-callstack.c b/lttng-context-callstack.c
109index 195990a..ba35a39 100644
110--- a/lttng-context-callstack.c
111+++ b/lttng-context-callstack.c
112@@ -141,7 +141,7 @@ int __lttng_add_callstack_generic(struct lttng_ctx **ctx,
113 field->record = lttng_callstack_record;
114 field->priv = fdata;
115 field->destroy = lttng_callstack_destroy;
116- wrapper_vmalloc_sync_all();
117+ wrapper_vmalloc_sync_mappings();
118 return 0;
119
120 error_create:
121diff --git a/lttng-context-cgroup-ns.c b/lttng-context-cgroup-ns.c
122index 81486e5..f324b7e 100644
123--- a/lttng-context-cgroup-ns.c
124+++ b/lttng-context-cgroup-ns.c
125@@ -97,7 +97,7 @@ int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx)
126 field->record = cgroup_ns_record;
127 field->get_value = cgroup_ns_get_value;
128 lttng_context_update(*ctx);
129- wrapper_vmalloc_sync_all();
130+ wrapper_vmalloc_sync_mappings();
131 return 0;
132 }
133 EXPORT_SYMBOL_GPL(lttng_add_cgroup_ns_to_ctx);
134diff --git a/lttng-context-cpu-id.c b/lttng-context-cpu-id.c
135index 3778225..6e2f3f4 100644
136--- a/lttng-context-cpu-id.c
137+++ b/lttng-context-cpu-id.c
138@@ -68,7 +68,7 @@ int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx)
139 field->record = cpu_id_record;
140 field->get_value = cpu_id_get_value;
141 lttng_context_update(*ctx);
142- wrapper_vmalloc_sync_all();
143+ wrapper_vmalloc_sync_mappings();
144 return 0;
145 }
146 EXPORT_SYMBOL_GPL(lttng_add_cpu_id_to_ctx);
147diff --git a/lttng-context-egid.c b/lttng-context-egid.c
148index 51536e2..bdcebb9 100644
149--- a/lttng-context-egid.c
150+++ b/lttng-context-egid.c
151@@ -70,7 +70,7 @@ int lttng_add_egid_to_ctx(struct lttng_ctx **ctx)
152 field->record = egid_record;
153 field->get_value = egid_get_value;
154 lttng_context_update(*ctx);
155- wrapper_vmalloc_sync_all();
156+ wrapper_vmalloc_sync_mappings();
157 return 0;
158 }
159 EXPORT_SYMBOL_GPL(lttng_add_egid_to_ctx);
160diff --git a/lttng-context-euid.c b/lttng-context-euid.c
161index 1bcd53f..c2b8dcd 100644
162--- a/lttng-context-euid.c
163+++ b/lttng-context-euid.c
164@@ -70,7 +70,7 @@ int lttng_add_euid_to_ctx(struct lttng_ctx **ctx)
165 field->record = euid_record;
166 field->get_value = euid_get_value;
167 lttng_context_update(*ctx);
168- wrapper_vmalloc_sync_all();
169+ wrapper_vmalloc_sync_mappings();
170 return 0;
171 }
172 EXPORT_SYMBOL_GPL(lttng_add_euid_to_ctx);
173diff --git a/lttng-context-gid.c b/lttng-context-gid.c
174index da54207..c355e8c 100644
175--- a/lttng-context-gid.c
176+++ b/lttng-context-gid.c
177@@ -70,7 +70,7 @@ int lttng_add_gid_to_ctx(struct lttng_ctx **ctx)
178 field->record = gid_record;
179 field->get_value = gid_get_value;
180 lttng_context_update(*ctx);
181- wrapper_vmalloc_sync_all();
182+ wrapper_vmalloc_sync_mappings();
183 return 0;
184 }
185 EXPORT_SYMBOL_GPL(lttng_add_gid_to_ctx);
186diff --git a/lttng-context-hostname.c b/lttng-context-hostname.c
187index e485aa9..17dbd57 100644
188--- a/lttng-context-hostname.c
189+++ b/lttng-context-hostname.c
190@@ -101,7 +101,7 @@ int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx)
191 field->record = hostname_record;
192 field->get_value = hostname_get_value;
193 lttng_context_update(*ctx);
194- wrapper_vmalloc_sync_all();
195+ wrapper_vmalloc_sync_mappings();
196 return 0;
197 }
198 EXPORT_SYMBOL_GPL(lttng_add_hostname_to_ctx);
199diff --git a/lttng-context-interruptible.c b/lttng-context-interruptible.c
200index f3da199..8bd279a 100644
201--- a/lttng-context-interruptible.c
202+++ b/lttng-context-interruptible.c
203@@ -75,7 +75,7 @@ int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx)
204 field->record = interruptible_record;
205 field->get_value = interruptible_get_value;
206 lttng_context_update(*ctx);
207- wrapper_vmalloc_sync_all();
208+ wrapper_vmalloc_sync_mappings();
209 return 0;
210 }
211 EXPORT_SYMBOL_GPL(lttng_add_interruptible_to_ctx);
212diff --git a/lttng-context-ipc-ns.c b/lttng-context-ipc-ns.c
213index 78d5966..40b901b 100644
214--- a/lttng-context-ipc-ns.c
215+++ b/lttng-context-ipc-ns.c
216@@ -96,7 +96,7 @@ int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx)
217 field->record = ipc_ns_record;
218 field->get_value = ipc_ns_get_value;
219 lttng_context_update(*ctx);
220- wrapper_vmalloc_sync_all();
221+ wrapper_vmalloc_sync_mappings();
222 return 0;
223 }
224 EXPORT_SYMBOL_GPL(lttng_add_ipc_ns_to_ctx);
225diff --git a/lttng-context-migratable.c b/lttng-context-migratable.c
226index e3d8ede..65154b8 100644
227--- a/lttng-context-migratable.c
228+++ b/lttng-context-migratable.c
229@@ -68,7 +68,7 @@ int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx)
230 field->record = migratable_record;
231 field->get_value = migratable_get_value;
232 lttng_context_update(*ctx);
233- wrapper_vmalloc_sync_all();
234+ wrapper_vmalloc_sync_mappings();
235 return 0;
236 }
237 EXPORT_SYMBOL_GPL(lttng_add_migratable_to_ctx);
238diff --git a/lttng-context-mnt-ns.c b/lttng-context-mnt-ns.c
239index b5bb955..cb59776 100644
240--- a/lttng-context-mnt-ns.c
241+++ b/lttng-context-mnt-ns.c
242@@ -98,7 +98,7 @@ int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx)
243 field->record = mnt_ns_record;
244 field->get_value = mnt_ns_get_value;
245 lttng_context_update(*ctx);
246- wrapper_vmalloc_sync_all();
247+ wrapper_vmalloc_sync_mappings();
248 return 0;
249 }
250 EXPORT_SYMBOL_GPL(lttng_add_mnt_ns_to_ctx);
251diff --git a/lttng-context-need-reschedule.c b/lttng-context-need-reschedule.c
252index f29fb28..94efaa5 100644
253--- a/lttng-context-need-reschedule.c
254+++ b/lttng-context-need-reschedule.c
255@@ -68,7 +68,7 @@ int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx)
256 field->record = need_reschedule_record;
257 field->get_value = need_reschedule_get_value;
258 lttng_context_update(*ctx);
259- wrapper_vmalloc_sync_all();
260+ wrapper_vmalloc_sync_mappings();
261 return 0;
262 }
263 EXPORT_SYMBOL_GPL(lttng_add_need_reschedule_to_ctx);
264diff --git a/lttng-context-net-ns.c b/lttng-context-net-ns.c
265index 6694037..37de09f 100644
266--- a/lttng-context-net-ns.c
267+++ b/lttng-context-net-ns.c
268@@ -97,7 +97,7 @@ int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx)
269 field->record = net_ns_record;
270 field->get_value = net_ns_get_value;
271 lttng_context_update(*ctx);
272- wrapper_vmalloc_sync_all();
273+ wrapper_vmalloc_sync_mappings();
274 return 0;
275 }
276 EXPORT_SYMBOL_GPL(lttng_add_net_ns_to_ctx);
277diff --git a/lttng-context-nice.c b/lttng-context-nice.c
278index 563e805..acaba85 100644
279--- a/lttng-context-nice.c
280+++ b/lttng-context-nice.c
281@@ -68,7 +68,7 @@ int lttng_add_nice_to_ctx(struct lttng_ctx **ctx)
282 field->record = nice_record;
283 field->get_value = nice_get_value;
284 lttng_context_update(*ctx);
285- wrapper_vmalloc_sync_all();
286+ wrapper_vmalloc_sync_mappings();
287 return 0;
288 }
289 EXPORT_SYMBOL_GPL(lttng_add_nice_to_ctx);
290diff --git a/lttng-context-perf-counters.c b/lttng-context-perf-counters.c
291index 43c4077..6b04d12 100644
292--- a/lttng-context-perf-counters.c
293+++ b/lttng-context-perf-counters.c
294@@ -321,7 +321,7 @@ int lttng_add_perf_counter_to_ctx(uint32_t type,
295 field->u.perf_counter = perf_field;
296 lttng_context_update(*ctx);
297
298- wrapper_vmalloc_sync_all();
299+ wrapper_vmalloc_sync_mappings();
300 return 0;
301
302 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
303diff --git a/lttng-context-pid-ns.c b/lttng-context-pid-ns.c
304index f039f26..ccf629d 100644
305--- a/lttng-context-pid-ns.c
306+++ b/lttng-context-pid-ns.c
307@@ -98,7 +98,7 @@ int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx)
308 field->record = pid_ns_record;
309 field->get_value = pid_ns_get_value;
310 lttng_context_update(*ctx);
311- wrapper_vmalloc_sync_all();
312+ wrapper_vmalloc_sync_mappings();
313 return 0;
314 }
315 EXPORT_SYMBOL_GPL(lttng_add_pid_ns_to_ctx);
316diff --git a/lttng-context-pid.c b/lttng-context-pid.c
317index b3caabb..326eabe 100644
318--- a/lttng-context-pid.c
319+++ b/lttng-context-pid.c
320@@ -68,7 +68,7 @@ int lttng_add_pid_to_ctx(struct lttng_ctx **ctx)
321 field->record = pid_record;
322 field->get_value = pid_get_value;
323 lttng_context_update(*ctx);
324- wrapper_vmalloc_sync_all();
325+ wrapper_vmalloc_sync_mappings();
326 return 0;
327 }
328 EXPORT_SYMBOL_GPL(lttng_add_pid_to_ctx);
329diff --git a/lttng-context-ppid.c b/lttng-context-ppid.c
330index ef84ad1..ff25288 100644
331--- a/lttng-context-ppid.c
332+++ b/lttng-context-ppid.c
333@@ -90,7 +90,7 @@ int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx)
334 field->record = ppid_record;
335 field->get_value = ppid_get_value;
336 lttng_context_update(*ctx);
337- wrapper_vmalloc_sync_all();
338+ wrapper_vmalloc_sync_mappings();
339 return 0;
340 }
341 EXPORT_SYMBOL_GPL(lttng_add_ppid_to_ctx);
342diff --git a/lttng-context-preemptible.c b/lttng-context-preemptible.c
343index 328f2a4..867805b 100644
344--- a/lttng-context-preemptible.c
345+++ b/lttng-context-preemptible.c
346@@ -86,7 +86,7 @@ int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx)
347 field->record = preemptible_record;
348 field->get_value = preemptible_get_value;
349 lttng_context_update(*ctx);
350- wrapper_vmalloc_sync_all();
351+ wrapper_vmalloc_sync_mappings();
352 return 0;
353 }
354 EXPORT_SYMBOL_GPL(lttng_add_preemptible_to_ctx);
355diff --git a/lttng-context-prio.c b/lttng-context-prio.c
356index b5d21e7..367f7bd 100644
357--- a/lttng-context-prio.c
358+++ b/lttng-context-prio.c
359@@ -89,7 +89,7 @@ int lttng_add_prio_to_ctx(struct lttng_ctx **ctx)
360 field->record = prio_record;
361 field->get_value = prio_get_value;
362 lttng_context_update(*ctx);
363- wrapper_vmalloc_sync_all();
364+ wrapper_vmalloc_sync_mappings();
365 return 0;
366 }
367 EXPORT_SYMBOL_GPL(lttng_add_prio_to_ctx);
368diff --git a/lttng-context-procname.c b/lttng-context-procname.c
369index 54007d1..8f18ca2 100644
370--- a/lttng-context-procname.c
371+++ b/lttng-context-procname.c
372@@ -72,7 +72,7 @@ int lttng_add_procname_to_ctx(struct lttng_ctx **ctx)
373 field->record = procname_record;
374 field->get_value = procname_get_value;
375 lttng_context_update(*ctx);
376- wrapper_vmalloc_sync_all();
377+ wrapper_vmalloc_sync_mappings();
378 return 0;
379 }
380 EXPORT_SYMBOL_GPL(lttng_add_procname_to_ctx);
381diff --git a/lttng-context-sgid.c b/lttng-context-sgid.c
382index 61c8d53..2a58cbd 100644
383--- a/lttng-context-sgid.c
384+++ b/lttng-context-sgid.c
385@@ -70,7 +70,7 @@ int lttng_add_sgid_to_ctx(struct lttng_ctx **ctx)
386 field->record = sgid_record;
387 field->get_value = sgid_get_value;
388 lttng_context_update(*ctx);
389- wrapper_vmalloc_sync_all();
390+ wrapper_vmalloc_sync_mappings();
391 return 0;
392 }
393 EXPORT_SYMBOL_GPL(lttng_add_sgid_to_ctx);
394diff --git a/lttng-context-suid.c b/lttng-context-suid.c
395index 66d3ef5..ab3e2a9 100644
396--- a/lttng-context-suid.c
397+++ b/lttng-context-suid.c
398@@ -70,7 +70,7 @@ int lttng_add_suid_to_ctx(struct lttng_ctx **ctx)
399 field->record = suid_record;
400 field->get_value = suid_get_value;
401 lttng_context_update(*ctx);
402- wrapper_vmalloc_sync_all();
403+ wrapper_vmalloc_sync_mappings();
404 return 0;
405 }
406 EXPORT_SYMBOL_GPL(lttng_add_suid_to_ctx);
407diff --git a/lttng-context-tid.c b/lttng-context-tid.c
408index d2a20e6..f6defc4 100644
409--- a/lttng-context-tid.c
410+++ b/lttng-context-tid.c
411@@ -71,7 +71,7 @@ int lttng_add_tid_to_ctx(struct lttng_ctx **ctx)
412 field->record = tid_record;
413 field->get_value = tid_get_value;
414 lttng_context_update(*ctx);
415- wrapper_vmalloc_sync_all();
416+ wrapper_vmalloc_sync_mappings();
417 return 0;
418 }
419 EXPORT_SYMBOL_GPL(lttng_add_tid_to_ctx);
420diff --git a/lttng-context-uid.c b/lttng-context-uid.c
421index 5f11de2..5593852 100644
422--- a/lttng-context-uid.c
423+++ b/lttng-context-uid.c
424@@ -70,7 +70,7 @@ int lttng_add_uid_to_ctx(struct lttng_ctx **ctx)
425 field->record = uid_record;
426 field->get_value = uid_get_value;
427 lttng_context_update(*ctx);
428- wrapper_vmalloc_sync_all();
429+ wrapper_vmalloc_sync_mappings();
430 return 0;
431 }
432 EXPORT_SYMBOL_GPL(lttng_add_uid_to_ctx);
433diff --git a/lttng-context-user-ns.c b/lttng-context-user-ns.c
434index 746e4d9..0ed62e3 100644
435--- a/lttng-context-user-ns.c
436+++ b/lttng-context-user-ns.c
437@@ -82,7 +82,7 @@ int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx)
438 field->record = user_ns_record;
439 field->get_value = user_ns_get_value;
440 lttng_context_update(*ctx);
441- wrapper_vmalloc_sync_all();
442+ wrapper_vmalloc_sync_mappings();
443 return 0;
444 }
445 EXPORT_SYMBOL_GPL(lttng_add_user_ns_to_ctx);
446diff --git a/lttng-context-uts-ns.c b/lttng-context-uts-ns.c
447index 7352a3d..283bc73 100644
448--- a/lttng-context-uts-ns.c
449+++ b/lttng-context-uts-ns.c
450@@ -96,7 +96,7 @@ int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx)
451 field->record = uts_ns_record;
452 field->get_value = uts_ns_get_value;
453 lttng_context_update(*ctx);
454- wrapper_vmalloc_sync_all();
455+ wrapper_vmalloc_sync_mappings();
456 return 0;
457 }
458 EXPORT_SYMBOL_GPL(lttng_add_uts_ns_to_ctx);
459diff --git a/lttng-context-vegid.c b/lttng-context-vegid.c
460index 604da2a..1431dac 100644
461--- a/lttng-context-vegid.c
462+++ b/lttng-context-vegid.c
463@@ -70,7 +70,7 @@ int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx)
464 field->record = vegid_record;
465 field->get_value = vegid_get_value;
466 lttng_context_update(*ctx);
467- wrapper_vmalloc_sync_all();
468+ wrapper_vmalloc_sync_mappings();
469 return 0;
470 }
471 EXPORT_SYMBOL_GPL(lttng_add_vegid_to_ctx);
472diff --git a/lttng-context-veuid.c b/lttng-context-veuid.c
473index 983ae6a..a1b5b70 100644
474--- a/lttng-context-veuid.c
475+++ b/lttng-context-veuid.c
476@@ -70,7 +70,7 @@ int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx)
477 field->record = veuid_record;
478 field->get_value = veuid_get_value;
479 lttng_context_update(*ctx);
480- wrapper_vmalloc_sync_all();
481+ wrapper_vmalloc_sync_mappings();
482 return 0;
483 }
484 EXPORT_SYMBOL_GPL(lttng_add_veuid_to_ctx);
485diff --git a/lttng-context-vgid.c b/lttng-context-vgid.c
486index e08c77d..0eed24e 100644
487--- a/lttng-context-vgid.c
488+++ b/lttng-context-vgid.c
489@@ -70,7 +70,7 @@ int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx)
490 field->record = vgid_record;
491 field->get_value = vgid_get_value;
492 lttng_context_update(*ctx);
493- wrapper_vmalloc_sync_all();
494+ wrapper_vmalloc_sync_mappings();
495 return 0;
496 }
497 EXPORT_SYMBOL_GPL(lttng_add_vgid_to_ctx);
498diff --git a/lttng-context-vpid.c b/lttng-context-vpid.c
499index 982ce55..b5b6ce0 100644
500--- a/lttng-context-vpid.c
501+++ b/lttng-context-vpid.c
502@@ -83,7 +83,7 @@ int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx)
503 field->record = vpid_record;
504 field->get_value = vpid_get_value;
505 lttng_context_update(*ctx);
506- wrapper_vmalloc_sync_all();
507+ wrapper_vmalloc_sync_mappings();
508 return 0;
509 }
510 EXPORT_SYMBOL_GPL(lttng_add_vpid_to_ctx);
511diff --git a/lttng-context-vppid.c b/lttng-context-vppid.c
512index 66d6382..347ac63 100644
513--- a/lttng-context-vppid.c
514+++ b/lttng-context-vppid.c
515@@ -112,7 +112,7 @@ int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx)
516 field->record = vppid_record;
517 field->get_value = vppid_get_value;
518 lttng_context_update(*ctx);
519- wrapper_vmalloc_sync_all();
520+ wrapper_vmalloc_sync_mappings();
521 return 0;
522 }
523 EXPORT_SYMBOL_GPL(lttng_add_vppid_to_ctx);
524diff --git a/lttng-context-vsgid.c b/lttng-context-vsgid.c
525index aca5eda..3daf889 100644
526--- a/lttng-context-vsgid.c
527+++ b/lttng-context-vsgid.c
528@@ -70,7 +70,7 @@ int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx)
529 field->record = vsgid_record;
530 field->get_value = vsgid_get_value;
531 lttng_context_update(*ctx);
532- wrapper_vmalloc_sync_all();
533+ wrapper_vmalloc_sync_mappings();
534 return 0;
535 }
536 EXPORT_SYMBOL_GPL(lttng_add_vsgid_to_ctx);
537diff --git a/lttng-context-vsuid.c b/lttng-context-vsuid.c
538index 66c1300..d7fb0db 100644
539--- a/lttng-context-vsuid.c
540+++ b/lttng-context-vsuid.c
541@@ -70,7 +70,7 @@ int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx)
542 field->record = vsuid_record;
543 field->get_value = vsuid_get_value;
544 lttng_context_update(*ctx);
545- wrapper_vmalloc_sync_all();
546+ wrapper_vmalloc_sync_mappings();
547 return 0;
548 }
549 EXPORT_SYMBOL_GPL(lttng_add_vsuid_to_ctx);
550diff --git a/lttng-context-vtid.c b/lttng-context-vtid.c
551index 8fd68a8..e81ba0e 100644
552--- a/lttng-context-vtid.c
553+++ b/lttng-context-vtid.c
554@@ -83,7 +83,7 @@ int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx)
555 field->record = vtid_record;
556 field->get_value = vtid_get_value;
557 lttng_context_update(*ctx);
558- wrapper_vmalloc_sync_all();
559+ wrapper_vmalloc_sync_mappings();
560 return 0;
561 }
562 EXPORT_SYMBOL_GPL(lttng_add_vtid_to_ctx);
563diff --git a/lttng-context-vuid.c b/lttng-context-vuid.c
564index 6ae575f..33e22d3 100644
565--- a/lttng-context-vuid.c
566+++ b/lttng-context-vuid.c
567@@ -70,7 +70,7 @@ int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx)
568 field->record = vuid_record;
569 field->get_value = vuid_get_value;
570 lttng_context_update(*ctx);
571- wrapper_vmalloc_sync_all();
572+ wrapper_vmalloc_sync_mappings();
573 return 0;
574 }
575 EXPORT_SYMBOL_GPL(lttng_add_vuid_to_ctx);
576diff --git a/lttng-context.c b/lttng-context.c
577index eb4534c..a6d4ee6 100644
578--- a/lttng-context.c
579+++ b/lttng-context.c
580@@ -11,7 +11,7 @@
581 #include <linux/list.h>
582 #include <linux/mutex.h>
583 #include <linux/slab.h>
584-#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
585+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
586 #include <lttng-events.h>
587 #include <lttng-tracer.h>
588
589diff --git a/lttng-events.c b/lttng-events.c
590index a1c8445..401f646 100644
591--- a/lttng-events.c
592+++ b/lttng-events.c
593@@ -30,7 +30,7 @@
594 #include <linux/uuid.h>
595 #include <linux/dmi.h>
596
597-#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
598+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
599 #include <wrapper/random.h>
600 #include <wrapper/tracepoint.h>
601 #include <wrapper/list.h>
602@@ -2753,9 +2753,9 @@ end:
603 * Registers a transport which can be used as output to extract the data out of
604 * LTTng. The module calling this registration function must ensure that no
605 * trap-inducing code will be executed by the transport functions. E.g.
606- * vmalloc_sync_all() must be called between a vmalloc and the moment the memory
607+ * vmalloc_sync_mappings() must be called between a vmalloc and the moment the memory
608 * is made visible to the transport function. This registration acts as a
609- * vmalloc_sync_all. Therefore, only if the module allocates virtual memory
610+ * vmalloc_sync_mappings. Therefore, only if the module allocates virtual memory
611 * after its registration must it synchronize the TLBs.
612 */
613 void lttng_transport_register(struct lttng_transport *transport)
614@@ -2763,9 +2763,9 @@ void lttng_transport_register(struct lttng_transport *transport)
615 /*
616 * Make sure no page fault can be triggered by the module about to be
617 * registered. We deal with this here so we don't have to call
618- * vmalloc_sync_all() in each module's init.
619+ * vmalloc_sync_mappings() in each module's init.
620 */
621- wrapper_vmalloc_sync_all();
622+ wrapper_vmalloc_sync_mappings();
623
624 mutex_lock(&sessions_mutex);
625 list_add_tail(&transport->node, &lttng_transport_list);
626diff --git a/lttng-ring-buffer-client.h b/lttng-ring-buffer-client.h
627index d5c512c..ff62830 100644
628--- a/lttng-ring-buffer-client.h
629+++ b/lttng-ring-buffer-client.h
630@@ -10,7 +10,7 @@
631 #include <linux/module.h>
632 #include <linux/types.h>
633 #include <lib/bitfield.h>
634-#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
635+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
636 #include <wrapper/trace-clock.h>
637 #include <lttng-events.h>
638 #include <lttng-tracer.h>
639@@ -766,7 +766,7 @@ static int __init lttng_ring_buffer_client_init(void)
640 * This vmalloc sync all also takes care of the lib ring buffer
641 * vmalloc'd module pages when it is built as a module into LTTng.
642 */
643- wrapper_vmalloc_sync_all();
644+ wrapper_vmalloc_sync_mappings();
645 lttng_transport_register(&lttng_relay_transport);
646 return 0;
647 }
648diff --git a/lttng-ring-buffer-metadata-client.h b/lttng-ring-buffer-metadata-client.h
649index 17ffd75..a098b8d 100644
650--- a/lttng-ring-buffer-metadata-client.h
651+++ b/lttng-ring-buffer-metadata-client.h
652@@ -9,7 +9,7 @@
653
654 #include <linux/module.h>
655 #include <linux/types.h>
656-#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
657+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
658 #include <lttng-events.h>
659 #include <lttng-tracer.h>
660
661@@ -428,7 +428,7 @@ static int __init lttng_ring_buffer_client_init(void)
662 * This vmalloc sync all also takes care of the lib ring buffer
663 * vmalloc'd module pages when it is built as a module into LTTng.
664 */
665- wrapper_vmalloc_sync_all();
666+ wrapper_vmalloc_sync_mappings();
667 lttng_transport_register(&lttng_relay_transport);
668 return 0;
669 }
670diff --git a/lttng-syscalls.c b/lttng-syscalls.c
671index fb14f6b..97f1ba9 100644
672--- a/lttng-syscalls.c
673+++ b/lttng-syscalls.c
674@@ -760,7 +760,7 @@ int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
675 struct lttng_kernel_event ev;
676 int ret;
677
678- wrapper_vmalloc_sync_all();
679+ wrapper_vmalloc_sync_mappings();
680
681 if (!chan->sc_table) {
682 /* create syscall table mapping syscall to events */
683diff --git a/probes/lttng-kprobes.c b/probes/lttng-kprobes.c
684index c0a15e4..a44eaa1 100644
685--- a/probes/lttng-kprobes.c
686+++ b/probes/lttng-kprobes.c
687@@ -132,7 +132,7 @@ int lttng_kprobes_register(const char *name,
688 * Well.. kprobes itself puts the page fault handler on the blacklist,
689 * but we can never be too careful.
690 */
691- wrapper_vmalloc_sync_all();
692+ wrapper_vmalloc_sync_mappings();
693
694 ret = register_kprobe(&event->u.kprobe.kp);
695 if (ret)
696diff --git a/probes/lttng-kretprobes.c b/probes/lttng-kretprobes.c
697index 4b18d46..ab98ff2 100644
698--- a/probes/lttng-kretprobes.c
699+++ b/probes/lttng-kretprobes.c
700@@ -221,7 +221,7 @@ int lttng_kretprobes_register(const char *name,
701 * Well.. kprobes itself puts the page fault handler on the blacklist,
702 * but we can never be too careful.
703 */
704- wrapper_vmalloc_sync_all();
705+ wrapper_vmalloc_sync_mappings();
706
707 ret = register_kretprobe(&lttng_krp->krp);
708 if (ret)
709diff --git a/probes/lttng-tracepoint-event-impl.h b/probes/lttng-tracepoint-event-impl.h
710index 321cdfa..77b8638 100644
711--- a/probes/lttng-tracepoint-event-impl.h
712+++ b/probes/lttng-tracepoint-event-impl.h
713@@ -15,7 +15,7 @@
714 #include <probes/lttng.h>
715 #include <probes/lttng-types.h>
716 #include <probes/lttng-probe-user.h>
717-#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
718+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */
719 #include <wrapper/ringbuffer/frontend_types.h>
720 #include <wrapper/ringbuffer/backend.h>
721 #include <wrapper/rcu.h>
722@@ -1391,7 +1391,7 @@ static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = {
723 #ifndef TP_MODULE_NOINIT
724 static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
725 {
726- wrapper_vmalloc_sync_all();
727+ wrapper_vmalloc_sync_mappings();
728 return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM));
729 }
730
731diff --git a/probes/lttng-uprobes.c b/probes/lttng-uprobes.c
732index 64d8237..bc10128 100644
733--- a/probes/lttng-uprobes.c
734+++ b/probes/lttng-uprobes.c
735@@ -161,7 +161,7 @@ int lttng_uprobes_add_callsite(struct lttng_event *event,
736 }
737
738 /* Ensure the memory we just allocated don't trigger page faults. */
739- wrapper_vmalloc_sync_all();
740+ wrapper_vmalloc_sync_mappings();
741
742 uprobe_handler->event = event;
743 uprobe_handler->up_consumer.handler = lttng_uprobes_handler_pre;
744diff --git a/probes/lttng.c b/probes/lttng.c
745index 383202c..05bc138 100644
746--- a/probes/lttng.c
747+++ b/probes/lttng.c
748@@ -116,7 +116,7 @@ int __init lttng_logger_init(void)
749 {
750 int ret = 0;
751
752- wrapper_vmalloc_sync_all();
753+ wrapper_vmalloc_sync_mappings();
754
755 /* /dev/lttng-logger */
756 ret = misc_register(&logger_dev);
757diff --git a/tests/probes/lttng-test.c b/tests/probes/lttng-test.c
758index e347639..b450e7d 100644
759--- a/tests/probes/lttng-test.c
760+++ b/tests/probes/lttng-test.c
761@@ -97,7 +97,7 @@ int __init lttng_test_init(void)
762 int ret = 0;
763
764 (void) wrapper_lttng_fixup_sig(THIS_MODULE);
765- wrapper_vmalloc_sync_all();
766+ wrapper_vmalloc_sync_mappings();
767 lttng_test_filter_event_dentry =
768 proc_create_data(LTTNG_TEST_FILTER_EVENT_FILE,
769 S_IRUGO | S_IWUGO, NULL,
770diff --git a/wrapper/vmalloc.h b/wrapper/vmalloc.h
771index 0c3eb86..54715b5 100644
772--- a/wrapper/vmalloc.h
773+++ b/wrapper/vmalloc.h
774@@ -21,8 +21,35 @@
775 #include <linux/kallsyms.h>
776 #include <wrapper/kallsyms.h>
777
778+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0))
779+
780+static inline
781+void wrapper_vmalloc_sync_mappings(void)
782+{
783+ void (*vmalloc_sync_mappings_sym)(void);
784+
785+ vmalloc_sync_mappings_sym = (void *) kallsyms_lookup_funcptr("vmalloc_sync_mappings");
786+ if (vmalloc_sync_mappings_sym) {
787+ vmalloc_sync_mappings_sym();
788+ } else {
789+#ifdef CONFIG_X86
790+ /*
791+ * Only x86 needs vmalloc_sync_mappings to make sure LTTng does not
792+ * trigger recursive page faults.
793+ */
794+ printk_once(KERN_WARNING "LTTng: vmalloc_sync_mappings symbol lookup failed.\n");
795+ printk_once(KERN_WARNING "Page fault handler and NMI tracing might trigger faults.\n");
796+#endif
797+ }
798+}
799+
800+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
801+
802+/*
803+ * Map vmalloc_sync_mappings to vmalloc_sync_all() on kernels before 5.7.
804+ */
805 static inline
806-void wrapper_vmalloc_sync_all(void)
807+void wrapper_vmalloc_sync_mappings(void)
808 {
809 void (*vmalloc_sync_all_sym)(void);
810
811@@ -40,13 +67,29 @@ void wrapper_vmalloc_sync_all(void)
812 #endif
813 }
814 }
815+
816+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
817+
818 #else
819
820+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0))
821+
822+static inline
823+void wrapper_vmalloc_sync_mappings(void)
824+{
825+ return vmalloc_sync_mappings();
826+}
827+
828+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
829+
830 static inline
831-void wrapper_vmalloc_sync_all(void)
832+void wrapper_vmalloc_sync_mappings(void)
833 {
834 return vmalloc_sync_all();
835 }
836+
837+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
838+
839 #endif
840
841 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0))
842@@ -61,7 +104,7 @@ void *lttng_kvmalloc_node(unsigned long size, gfp_t flags, int node)
843 * Make sure we don't trigger recursive page faults in the
844 * tracing fast path.
845 */
846- wrapper_vmalloc_sync_all();
847+ wrapper_vmalloc_sync_mappings();
848 }
849 return ret;
850 }
851--
8522.17.1
853
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0002-Fix-missing-wrapper-rename-to-wrapper_vmalloc_sync_m.patch b/meta/recipes-kernel/lttng/lttng-modules/0002-Fix-missing-wrapper-rename-to-wrapper_vmalloc_sync_m.patch
new file mode 100644
index 0000000000..807fe933cd
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0002-Fix-missing-wrapper-rename-to-wrapper_vmalloc_sync_m.patch
@@ -0,0 +1,32 @@
1From 4d1817c129310945bf0b8227ebc0fbb4f6299dc7 Mon Sep 17 00:00:00 2001
2From: Michael Jeanson <mjeanson@efficios.com>
3Date: Wed, 6 May 2020 11:03:32 -0400
4Subject: [PATCH 2/4] Fix: missing wrapper rename to
5 wrapper_vmalloc_sync_mappings
6
7Upstream-Status: Backport [https://github.com/lttng/lttng-modules/commit/c1ba644f2edf6a5bc030111ce4167a8798cc1053]
8
9Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
10Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
11Change-Id: Idf7082a980c5a604bfef5c69906678b5083a9bbf
12Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
13---
14 wrapper/vmalloc.h | 2 +-
15 1 file changed, 1 insertion(+), 1 deletion(-)
16
17diff --git a/wrapper/vmalloc.h b/wrapper/vmalloc.h
18index 54715b5..5d0b389 100644
19--- a/wrapper/vmalloc.h
20+++ b/wrapper/vmalloc.h
21@@ -216,7 +216,7 @@ void *lttng_kvmalloc_node(unsigned long size, gfp_t flags, int node)
22 * Make sure we don't trigger recursive page faults in the
23 * tracing fast path.
24 */
25- wrapper_vmalloc_sync_all();
26+ wrapper_vmalloc_sync_mappings();
27 }
28 return ret;
29 }
30--
312.17.1
32
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0003-Fix-Use-vmalloc_sync_mappings-on-kernel-5.6-as-well.patch b/meta/recipes-kernel/lttng/lttng-modules/0003-Fix-Use-vmalloc_sync_mappings-on-kernel-5.6-as-well.patch
new file mode 100644
index 0000000000..48d7e2f00c
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0003-Fix-Use-vmalloc_sync_mappings-on-kernel-5.6-as-well.patch
@@ -0,0 +1,88 @@
1From 23cfd7b53ec1521d3c23ceddfda49352c2d349dc Mon Sep 17 00:00:00 2001
2From: Ovidiu Panait <ovidiu.panait@windriver.com>
3Date: Thu, 14 May 2020 13:05:24 +0300
4Subject: [PATCH 3/4] Fix: Use vmalloc_sync_mappings on kernel 5.6 as well
5
6Upstream commit [1], that got rid of vmalloc_sync_all and introduced
7vmalloc_sync_mappings, is a v5.6 commit:
8$ git tag --contains 763802b53a427ed3cbd419dbba255c414fdd9e7c
9v5.6
10v5.6-rc7
11v5.7-rc1
12v5.7-rc2
13v5.7-rc3
14
15Extend the LINUX_VERSION_CODE check to v5.6 to fix the following warnings:
16...
17[ 483.242037] LTTng: vmalloc_sync_all symbol lookup failed.
18[ 483.257056] Page fault handler and NMI tracing might trigger faults.
19...
20
21[1] https://github.com/torvalds/linux/commit/763802b53a427ed3cbd419dbba255c414fdd9e7c
22
23Upstream-Status: Backport [https://github.com/lttng/lttng-modules/commit/da356b324dfc160e09b8966b691792037badf455]
24
25Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
26Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
27Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
28---
29 wrapper/vmalloc.h | 12 ++++++------
30 1 file changed, 6 insertions(+), 6 deletions(-)
31
32diff --git a/wrapper/vmalloc.h b/wrapper/vmalloc.h
33index 5d0b389..d905f60 100644
34--- a/wrapper/vmalloc.h
35+++ b/wrapper/vmalloc.h
36@@ -21,7 +21,7 @@
37 #include <linux/kallsyms.h>
38 #include <wrapper/kallsyms.h>
39
40-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0))
41+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
42
43 static inline
44 void wrapper_vmalloc_sync_mappings(void)
45@@ -43,7 +43,7 @@ void wrapper_vmalloc_sync_mappings(void)
46 }
47 }
48
49-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
50+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
51
52 /*
53 * Map vmalloc_sync_mappings to vmalloc_sync_all() on kernels before 5.7.
54@@ -68,11 +68,11 @@ void wrapper_vmalloc_sync_mappings(void)
55 }
56 }
57
58-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
59+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
60
61 #else
62
63-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0))
64+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
65
66 static inline
67 void wrapper_vmalloc_sync_mappings(void)
68@@ -80,7 +80,7 @@ void wrapper_vmalloc_sync_mappings(void)
69 return vmalloc_sync_mappings();
70 }
71
72-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
73+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
74
75 static inline
76 void wrapper_vmalloc_sync_mappings(void)
77@@ -88,7 +88,7 @@ void wrapper_vmalloc_sync_mappings(void)
78 return vmalloc_sync_all();
79 }
80
81-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,7,0)) */
82+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) */
83
84 #endif
85
86--
872.17.1
88
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch b/meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch
new file mode 100644
index 0000000000..a0b870486f
--- /dev/null
+++ b/meta/recipes-kernel/lttng/lttng-modules/0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch
@@ -0,0 +1,67 @@
1From f419315f28a1da656c4faa8a852a2928ce38c72d Mon Sep 17 00:00:00 2001
2From: Ovidiu Panait <ovidiu.panait@windriver.com>
3Date: Thu, 14 May 2020 14:27:17 +0300
4Subject: [PATCH 4/4] Update: Use vmalloc_sync_mappings for stable kernels
5
6Starting from v5.4.28/v5.2.37/v4.19.113/v4.14.175/v4.9.218/v4.4.218, stable
7kernel branches backported v5.6 upstream commit [1], causing the following
8warnings:
9...
10[ 483.242037] LTTng: vmalloc_sync_all symbol lookup failed.
11[ 483.257056] Page fault handler and NMI tracing might trigger faults.
12...
13
14Extend check for vmalloc_sync_mappings for stable kernels as well.
15
16[1] https://github.com/torvalds/linux/commit/763802b53a427ed3cbd419dbba255c414fdd9e7c
17
18[ Edit: minor coding style fix by Mathieu Desnoyers. ]
19
20Upstream-Status: Backport [https://github.com/lttng/lttng-modules/commit/5939591f87dc291bc858caf72decfb8569d802e3]
21
22Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
23Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
24Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
25---
26 wrapper/vmalloc.h | 17 +++++++++++++++--
27 1 file changed, 15 insertions(+), 2 deletions(-)
28
29diff --git a/wrapper/vmalloc.h b/wrapper/vmalloc.h
30index d905f60..c7538ae 100644
31--- a/wrapper/vmalloc.h
32+++ b/wrapper/vmalloc.h
33@@ -20,8 +20,15 @@
34
35 #include <linux/kallsyms.h>
36 #include <wrapper/kallsyms.h>
37+#include <lttng-kernel-version.h>
38
39-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
40+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0) \
41+ || LTTNG_KERNEL_RANGE(5,4,28, 5,5,0) \
42+ || LTTNG_KERNEL_RANGE(5,2,37, 5,3,0) \
43+ || LTTNG_KERNEL_RANGE(4,19,113, 4,20,0) \
44+ || LTTNG_KERNEL_RANGE(4,14,175, 4,15,0) \
45+ || LTTNG_KERNEL_RANGE(4,9,218, 4,10,0) \
46+ || LTTNG_KERNEL_RANGE(4,4,218, 4,5,0))
47
48 static inline
49 void wrapper_vmalloc_sync_mappings(void)
50@@ -72,7 +79,13 @@ void wrapper_vmalloc_sync_mappings(void)
51
52 #else
53
54-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0))
55+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0) \
56+ || LTTNG_KERNEL_RANGE(5,4,28, 5,5,0) \
57+ || LTTNG_KERNEL_RANGE(5,2,37, 5,3,0) \
58+ || LTTNG_KERNEL_RANGE(4,19,113, 4,20,0) \
59+ || LTTNG_KERNEL_RANGE(4,14,175, 4,15,0) \
60+ || LTTNG_KERNEL_RANGE(4,9,218, 4,10,0) \
61+ || LTTNG_KERNEL_RANGE(4,4,218, 4,5,0))
62
63 static inline
64 void wrapper_vmalloc_sync_mappings(void)
65--
662.17.1
67
diff --git a/meta/recipes-kernel/lttng/lttng-modules_2.12.0.bb b/meta/recipes-kernel/lttng/lttng-modules_2.12.0.bb
index f706f89621..4a6c42e3bf 100644
--- a/meta/recipes-kernel/lttng/lttng-modules_2.12.0.bb
+++ b/meta/recipes-kernel/lttng/lttng-modules_2.12.0.bb
@@ -11,6 +11,10 @@ COMPATIBLE_HOST = '(x86_64|i.86|powerpc|aarch64|mips|nios2|arm|riscv).*-linux'
11SRC_URI = "https://lttng.org/files/${BPN}/${BPN}-${PV}.tar.bz2 \ 11SRC_URI = "https://lttng.org/files/${BPN}/${BPN}-${PV}.tar.bz2 \
12 file://Makefile-Do-not-fail-if-CONFIG_TRACEPOINTS-is-not-en.patch \ 12 file://Makefile-Do-not-fail-if-CONFIG_TRACEPOINTS-is-not-en.patch \
13 file://BUILD_RUNTIME_BUG_ON-vs-gcc7.patch \ 13 file://BUILD_RUNTIME_BUG_ON-vs-gcc7.patch \
14 file://0001-Update-for-kernel-5.7-use-vmalloc_sync_mappings-on-k.patch \
15 file://0002-Fix-missing-wrapper-rename-to-wrapper_vmalloc_sync_m.patch \
16 file://0003-Fix-Use-vmalloc_sync_mappings-on-kernel-5.6-as-well.patch \
17 file://0004-Update-Use-vmalloc_sync_mappings-for-stable-kernels.patch \
14 " 18 "
15 19
16SRC_URI[md5sum] = "be252df5013ea03894921d0b493c7b6c" 20SRC_URI[md5sum] = "be252df5013ea03894921d0b493c7b6c"
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-18 03:26:12 +0000