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mm: use dedicated helper to access rlimit value 

Use rlimit() helper instead of manually writing whole chain from current
task to rlim_cur.

Link: http://lkml.kernel.org/r/20170705172811.8027-1-k.opasiak@samsung.com
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Krzysztof Opasiak 2017-07-10 15:50:03 -07:00 committed by Linus Torvalds
parent b17c070fb6
commit 24c79d8e0a
1 changed files with 2 additions and 3 deletions
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5
mm/mmap.c
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@ -2177,7 +2177,6 @@ static int acct_stack_growth(struct vm_area_struct *vma,
unsigned long size, unsigned long grow)
{
struct mm_struct *mm = vma->vm_mm;
struct rlimit *rlim = current->signal->rlim;
unsigned long new_start;
/* address space limit tests */
@ -2185,7 +2184,7 @@ static int acct_stack_growth(struct vm_area_struct *vma,
return -ENOMEM;
/* Stack limit test */
if (size > READ_ONCE(rlim[RLIMIT_STACK].rlim_cur))
if (size > rlimit(RLIMIT_STACK))
return -ENOMEM;
/* mlock limit tests */
@ -2193,7 +2192,7 @@ static int acct_stack_growth(struct vm_area_struct *vma,
unsigned long locked;
unsigned long limit;
locked = mm->locked_vm + grow;
limit = READ_ONCE(rlim[RLIMIT_MEMLOCK].rlim_cur);
limit = rlimit(RLIMIT_MEMLOCK);
limit >>= PAGE_SHIFT;
if (locked > limit && !capable(CAP_IPC_LOCK))
return -ENOMEM;