mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

[S390] Enable flexible mmap layout for 64 bit processes 

Historically 64 bit processes use the legacy address layout. However
there is no reason why 64 bit processes shouldn't benefit from the
flexible mmap layout advantages.
Therefore just enable it.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2011-01-12 09:55:25 +01:00 committed by Martin Schwidefsky
parent e7828bbd5e
commit 7e0d48574e
1 changed files with 4 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/s390/mm/mmap.c
View File

@ -61,16 +61,11 @@ static inline unsigned long mmap_base(void)
static inline int mmap_is_legacy(void)
{
#ifdef CONFIG_64BIT
/*
* Force standard allocation for 64 bit programs.
*/
if (!is_compat_task())
if (current->personality & ADDR_COMPAT_LAYOUT)
return 1;
#endif
return sysctl_legacy_va_layout ||
(current->personality & ADDR_COMPAT_LAYOUT) ||
rlimit(RLIMIT_STACK) == RLIM_INFINITY;
if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
return 1;
return sysctl_legacy_va_layout;
}
#ifndef CONFIG_64BIT