From: Shaohua Li <shaohua.li@intel.com>
Date: Fri, 16 Dec 2011 04:50:40 +0000 (+1100)
Subject: thp: remove unnecessary tlb flush for mprotect
X-Git-Tag: next-20111221~2^2~37
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2e4220527b10f1e0f75a4b05653bf4f0f0b6a2d6;p=karo-tx-linux.git

thp: remove unnecessary tlb flush for mprotect

change_protection() will do TLB flush later, don't need duplicate tlb
flush.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 763711121ef5..964fc5a2edd2 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1145,7 +1145,6 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
 			entry = pmd_modify(entry, newprot);
 			set_pmd_at(mm, addr, pmd, entry);
 			spin_unlock(&vma->vm_mm->page_table_lock);
-			flush_tlb_range(vma, addr, addr + HPAGE_PMD_SIZE);
 			ret = 1;
 		}
 	} else