Commits
Arseny Solokha committed 0dc294f717d
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>