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[PATCH] rcu file: use atomic primitives

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Use atomic_inc_not_zero for rcu files instead of special case rcuref.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2006-01-08 01:02:19 -08:00 • committed by Linus Torvalds
parent a57004e1af
commit 095975da26
9 changed files with 48 additions and 291 deletions
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3
include/linux/fs.h
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@ -9,7 +9,6 @@
#include <linux/config.h>
#include <linux/limits.h>
#include <linux/ioctl.h>
#include <linux/rcuref.h>
/*
* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
@ -653,7 +652,7 @@ extern spinlock_t files_lock;
#define file_list_lock() spin_lock(&files_lock);
#define file_list_unlock() spin_unlock(&files_lock);
#define get_file(x) rcuref_inc(&(x)->f_count)
#define get_file(x) atomic_inc(&(x)->f_count)
#define file_count(x) atomic_read(&(x)->f_count)
#define MAX_NON_LFS ((1UL<<31) - 1)