From 12523bdce1a6b5a3a2627b9901162bbd3eef33ed Mon Sep 17 00:00:00 2001
From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Date: Fri, 31 Mar 2006 02:30:18 -0800
Subject: [PATCH] [PATCH] uml: idle thread needn't take access to init_mm
Comparing this code which is the actual body of the arch-independent
cpu_idle(), it is clear that it's unnecessary to set ->mm and ->active_mm;
beyond that, a kernel thread is not supposed to have ->mm != NULL, only
active_mm.
This showed up because I used the assumption (which is IMHO valid) that kernel
thread have their ->mm == NULL, and it failed for this thread.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/um/kernel/process_kern.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index 6922bdfb5ad5..ba8a52c1f7ae 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -185,10 +185,6 @@ void default_idle(void)
{
CHOOSE_MODE(uml_idle_timer(), (void) 0);
- atomic_inc(&init_mm.mm_count);
- current->mm = &init_mm;
- current->active_mm = &init_mm;
-
while(1){
/* endless idle loop with no priority at all */
--
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