ltp: diotest4: Let kernel pick an address when calling mmap

Error:
diotest4 10 TBROK : diotest4.c:368: can't mmap file: Invalid argument
diotest4 11 TBROK : diotest4.c:368: Remaining cases broken

This is because the manually specified addr from mmap is invalid.
We should let kernel itself pick an addrress.

(From OE-Core rev: c49e4fd1cc573170fd18c2f6313f8d77f5e68470)

Signed-off-by: Hongzhi.Song <hongzhi.song@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/meta/recipes-extended/ltp/ltp/0001-diotest4-Let-kernel-pick-an-address-when-calling-mma.patch b/meta/recipes-extended/ltp/ltp/0001-diotest4-Let-kernel-pick-an-address-when-calling-mma.patch
new file mode 100644
index 0000000000..620027bd0d
--- /dev/null
+++ b/meta/recipes-extended/ltp/ltp/0001-diotest4-Let-kernel-pick-an-address-when-calling-mma.patch
@@ -0,0 +1,49 @@
+From 785809201ad7dea2872d493efbfd65bb215710d6 Mon Sep 17 00:00:00 2001
+From: "Hongzhi.Song" <hongzhi.song@windriver.com>
+Date: Sun, 30 Jun 2019 21:56:16 -0400
+Subject: [PATCH] diotest4: Let kernel pick an address when calling mmap
+
+Error:
+diotest4 10 TBROK : diotest4.c:368: can't mmap file: Invalid argument
+diotest4 11 TBROK : diotest4.c:368: Remaining cases broken
+
+This is because the specified addr from mmap is invalid.
+We should let kernel itself pick an addrress.
+
+Signed-off-by: Jan Stancek <jstancek@redhat.com>
+
+Upstream-Status: Submitted [https://lists.linux.it/pipermail/ltp/2019-June/012570.html]
+
+Signed-off-by: Hongzhi.Song <hongzhi.song@windriver.com>
+---
+ testcases/kernel/io/direct_io/diotest4.c | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/testcases/kernel/io/direct_io/diotest4.c b/testcases/kernel/io/direct_io/diotest4.c
+index e4616e4..d88c431 100644
+--- a/testcases/kernel/io/direct_io/diotest4.c
++++ b/testcases/kernel/io/direct_io/diotest4.c
+@@ -352,18 +352,14 @@ int main(int argc, char *argv[])
+        total++;
+ 
+        /* Test-10: read, write to a mmaped file */
+-       shm_base = (char *)(((long)sbrk(0) + (shmsz - 1)) & ~(shmsz - 1));
+-       if (shm_base == NULL) {
+-               tst_brkm(TBROK, cleanup, "sbrk failed: %s", strerror(errno));
+-       }
+        offset = 4096;
+        count = bufsize;
+        if ((fd = open(filename, O_DIRECT | O_RDWR)) < 0) {
+                tst_brkm(TBROK, cleanup, "can't open %s: %s",
+                         filename, strerror(errno));
+        }
+-       shm_base = mmap(shm_base, 0x100000, PROT_READ | PROT_WRITE,
+-                       MAP_SHARED | MAP_FIXED, fd, 0);
++       shm_base = mmap(NULL, 0x100000, PROT_READ | PROT_WRITE,
++                       MAP_SHARED, fd, 0);
+        if (shm_base == (caddr_t) - 1) {
+                tst_brkm(TBROK, cleanup, "can't mmap file: %s",
+                         strerror(errno));
+-- 
+2.8.1
+