commit 094804c5a132f04c12dd4902ee15c64362e5c1af
author Andi Kleen <ak@suse.de> Tue Oct 11 01:03:39 2005 +0200
committer Linus Torvalds <torvalds@g5.osdl.org> Mon Oct 10 16:10:33 2005 -0700
tree 44a146301f43a7ba9db72308585122218ccafe6f
parent f96c3bbe91117402f13119ce9e609db9087ed58f

[PATCH] x86_64: Fix change_page_attr cache flushing

Noticed by Terence Ripperda

Undo wrong change in global_flush_tlb. We need to flush the caches in all
cases, not just when pages were reverted. This was a bogus optimization
added earlier, but it was wrong.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/x86_64/mm/pageattr.c

diff --git a/arch/x86_64/mm/pageattr.c b/arch/x86_64/mm/pageattr.c
index 94862e1..b90e8fe 100644
--- a/arch/x86_64/mm/pageattr.c
+++ b/arch/x86_64/mm/pageattr.c
@@ -220,8 +220,6 @@
 	down_read(&init_mm.mmap_sem);
 	df = xchg(&df_list, NULL);
 	up_read(&init_mm.mmap_sem);
-	if (!df)
-		return;
 	flush_map((df && !df->next) ? df->address : 0);
 	for (; df; df = next_df) { 
 		next_df = df->next;