diff options
| author | Arseny Solokha <asolokha@kb.kras.ru> | 2015-01-30 19:08:27 +0700 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-01-30 18:39:00 -0600 |
| commit | 0dc294f717d41bfbafc746a7a96a7bc0f114c20c (patch) | |
| tree | fa98880b9e87e95c9b4f94546020df14d95e36e7 /arch/powerpc/mm/pgtable_64.c | |
| parent | c9111a41dc27db8a9b6c0429f4965ddd8766f620 (diff) | |
powerpc/mm: bail out early when flushing TLB page
MMU_NO_CONTEXT is conditionally defined as 0 or (unsigned int)-1. However,
in __flush_tlb_page() a corresponding variable is only tested for open
coded 0, which can cause NULL pointer dereference if `mm' argument was
legitimately passed as such.
Bail out early in case the first argument is NULL, thus eliminate confusion
between different values of MMU_NO_CONTEXT and avoid disabling and then
re-enabling preemption unnecessarily.
Signed-off-by: Arseny Solokha <asolokha@kb.kras.ru>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/mm/pgtable_64.c')
0 files changed, 0 insertions, 0 deletions