From: Hugh Dickins <hugh@veritas.com>
Date: Sun, 30 Oct 2005 01:15:58 +0000 (-0700)
Subject: [PATCH] mm: exit_mmap need not reset
X-Git-Tag: v2.6.15-rc1~730^2^2~67
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c1fd6b964860cdcf44b6b98d7dcd8cc16a0a26d;p=linux-2.6

[PATCH] mm: exit_mmap need not reset

exit_mmap resets various mm_struct fields, but the mm is well on its way out,
and none of those fields matter by this point.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/mm/mmap.c b/mm/mmap.c
index a3984fad3f..459b9f068a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1948,12 +1948,6 @@ void exit_mmap(struct mm_struct *mm)
 	free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0);
 	tlb_finish_mmu(tlb, 0, end);
 
-	mm->mmap = mm->mmap_cache = NULL;
-	mm->mm_rb = RB_ROOT;
-	set_mm_counter(mm, rss, 0);
-	mm->total_vm = 0;
-	mm->locked_vm = 0;
-
 	spin_unlock(&mm->page_table_lock);
 
 	/*