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powerpc: Use helpers for rlimits 

Make sure compiler won't do weird things with limits. E.g. fetching
them twice may return 2 different values after writable limits are
implemented.

I.e. either use rlimit helpers added in
3e10e716ab
or ACCESS_ONCE if not applicable.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Jiri Slaby 2010-01-06 05:24:31 +00:00 committed by Benjamin Herrenschmidt
parent c81b812a33
commit 4bf936b9e4
2 changed files with 3 additions and 3 deletions
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4
arch/powerpc/mm/mmap_64.c
View File

@ -47,7 +47,7 @@ static inline int mmap_is_legacy(void)
if (current->personality & ADDR_COMPAT_LAYOUT)
return 1;
if (current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY)
if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
return 1;
return sysctl_legacy_va_layout;
@ -77,7 +77,7 @@ static unsigned long mmap_rnd(void)
static inline unsigned long mmap_base(void)
{
unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
unsigned long gap = rlimit(RLIMIT_STACK);
if (gap < MIN_GAP)
gap = MIN_GAP;

2
arch/powerpc/platforms/cell/spufs/coredump.c
View File

@ -54,7 +54,7 @@ static ssize_t do_coredump_read(int num, struct spu_context *ctx, void *buffer,
*/
static int spufs_dump_write(struct file *file, const void *addr, int nr, loff_t *foffset)
{
unsigned long limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
unsigned long limit = rlimit(RLIMIT_CORE);
ssize_t written;
if (*foffset + nr > limit)