diff options
Diffstat (limited to 'arch/powerpc/mm/pgtable.c')
-rw-r--r-- | arch/powerpc/mm/pgtable.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c index 627767d6169b..a65979a5f75b 100644 --- a/arch/powerpc/mm/pgtable.c +++ b/arch/powerpc/mm/pgtable.c @@ -30,6 +30,14 @@ #include <asm/tlbflush.h> #include <asm/tlb.h> +#ifdef CONFIG_SMP + +/* + * Handle batching of page table freeing on SMP. Page tables are + * queued up and send to be freed later by RCU in order to avoid + * freeing a page table page that is being walked without locks + */ + static DEFINE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur); static unsigned long pte_freelist_forced_free; @@ -116,6 +124,8 @@ void pte_free_finish(void) *batchp = NULL; } +#endif /* CONFIG_SMP */ + /* * Handle i/d cache flushing, called from set_pte_at() or ptep_set_access_flags() */ |