From fa0aafb8acb684e68231ff0a547ed249f8dc31a5 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 20 Sep 2018 10:54:04 +0200
Subject: asm-generic/tlb: Remove tlb_flush_mmu_free()

As the comment notes; it is a potentially dangerous operation. Just
use tlb_flush_mmu(), that will skip the (double) TLB invalidate if
it really isn't needed anyway.

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>
---
 mm/memory.c     | 2 +-
 mm/mmu_gather.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'mm')

diff --git a/mm/memory.c b/mm/memory.c
index 1aa5c03566f1..36aac6844662 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1155,7 +1155,7 @@ again:
 	 */
 	if (force_flush) {
 		force_flush = 0;
-		tlb_flush_mmu_free(tlb);
+		tlb_flush_mmu(tlb);
 		if (addr != end)
 			goto again;
 	}
diff --git a/mm/mmu_gather.c b/mm/mmu_gather.c
index 7f5b2b8aa9dd..35699a4d0a74 100644
--- a/mm/mmu_gather.c
+++ b/mm/mmu_gather.c
@@ -91,7 +91,7 @@ bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_
 
 #endif /* HAVE_MMU_GATHER_NO_GATHER */
 
-void tlb_flush_mmu_free(struct mmu_gather *tlb)
+static void tlb_flush_mmu_free(struct mmu_gather *tlb)
 {
 #ifdef CONFIG_HAVE_RCU_TABLE_FREE
 	tlb_table_flush(tlb);
-- 
cgit v1.2.3