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3 Commits

Author SHA1 Message Date
SeongJae Park
70d1a4e668 selftests/vm: Set mmap()'s fd as -1 for MAP_ANONYMOUS flag 
Man page of mmap() says that portable applications should ensure fd
argument to be -1 if MAP_ANONYMOUS flag is set as below:
```
The  mapping is not backed by any file; its contents are initialized to
zero.  The fd and offset arguments are ignored; however, some
implementations require  fd  to be  -1  if  MAP_ANONYMOUS  (or
MAP_ANON)  is specified, and portable applications
should ensure this.
```

However, few mmap() calls under selftests/vm/ uses 0 as fd though they
use MAP_ANONYMOUS flag.  This commit changes the argument to be -1 as
recommended.

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
 2017-04-11 09:41:38 -06:00
Helge Deller
a4351cb551 selftests/thuge-gen: Use platform specific MAP_HUGETLB value 
Do not hardcode MAP_HUGETLB to 0x40000, since quite some architectures
use a different value.

Tested with a parisc architecture 64bit kernel.

Signed-off-by: Helge Deller <deller@gmx.de>
 2016-05-22 21:43:41 +02:00
Andi Kleen
fcc1f2d5dd selftests: add a test program for variable huge page sizes in mmap/shmget 
Also remove -Wextra because gcc-4.6 emits lots of irritating
signed/unsigned comparison warnings.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2012-12-11 17:22:25 -08:00