linux-kernel - [PATCH] x86: trivial: remove unnecessary get_order in free_thread

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Date:	Sat, 20 Aug 2011 21:24:57 +0800
From:	Zhao Jin <cronozhj@...il.com>
To:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, trivial@...nel.org
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH] x86: trivial: remove unnecessary get_order in free_thread_info

From: Zhao Jin <cronozhj@...il.com>

Because THREAD_SIZE is defined as PAGE_SIZE << THREAD_ORDER on x86, the 
call of get_order(THREAD_SIZE) can be replaced with THREAD_ORDER.

Signed-off-by: Zhao Jin <cronozhj@...il.com>
---
  arch/x86/kernel/process.c |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index e7e3b01..b9b3b1a 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -49,7 +49,7 @@ void free_thread_xstate(struct task_struct *tsk)
  void free_thread_info(struct thread_info *ti)
  {
      free_thread_xstate(ti->task);
-    free_pages((unsigned long)ti, get_order(THREAD_SIZE));
+    free_pages((unsigned long)ti, THREAD_ORDER);
  }

  void arch_task_cache_init(void)
-- 
1.7.4.1

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