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authorPeter Zijlstra <peterz@infradead.org>2018-09-19 14:24:41 +0300
committerIngo Molnar <mingo@kernel.org>2019-04-03 11:32:47 +0300
commit96bc9567cbe112e9320250f01b9c060c882e8619 (patch)
tree7948ca705fc25538b784b4f28dd62a2c5ec88b97 /mm/mmu_gather.c
parent8b6dd0c47894e2c190560914318aa4181bc8c2f2 (diff)
downloadlinux-96bc9567cbe112e9320250f01b9c060c882e8619.tar.xz
asm-generic/tlb, arch: Invert CONFIG_HAVE_RCU_TABLE_INVALIDATE
Make issuing a TLB invalidate for page-table pages the normal case. The reason is twofold: - too many invalidates is safer than too few, - most architectures use the linux page-tables natively and would thus require this. Make it an opt-out, instead of an opt-in. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/mmu_gather.c')
-rw-r--r--mm/mmu_gather.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mmu_gather.c b/mm/mmu_gather.c
index 14dfc97155e4..2a5322d52b0a 100644
--- a/mm/mmu_gather.c
+++ b/mm/mmu_gather.c
@@ -157,7 +157,7 @@ bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_
*/
static inline void tlb_table_invalidate(struct mmu_gather *tlb)
{
-#ifdef CONFIG_HAVE_RCU_TABLE_INVALIDATE
+#ifndef CONFIG_HAVE_RCU_TABLE_NO_INVALIDATE
/*
* Invalidate page-table caches used by hardware walkers. Then we still
* need to RCU-sched wait while freeing the pages because software