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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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8
fs/file_table.c
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@@ -117,7 +117,7 @@ EXPORT_SYMBOL(get_empty_filp);
void fastcall fput(struct file *file)
{
if (rcuref_dec_and_test(&file->f_count))
if (atomic_dec_and_test(&file->f_count))
__fput(file);
}
@@ -166,7 +166,7 @@ struct file fastcall *fget(unsigned int fd)
rcu_read_lock();
file = fcheck_files(files, fd);
if (file) {
if (!rcuref_inc_lf(&file->f_count)) {
if (!atomic_inc_not_zero(&file->f_count)) {
/* File object ref couldn't be taken */
rcu_read_unlock();
return NULL;
@@ -198,7 +198,7 @@ struct file fastcall *fget_light(unsigned int fd, int *fput_needed)
rcu_read_lock();
file = fcheck_files(files, fd);
if (file) {
if (rcuref_inc_lf(&file->f_count))
if (atomic_inc_not_zero(&file->f_count))
*fput_needed = 1;
else
/* Didn't get the reference, someone's freed */
@@ -213,7 +213,7 @@ struct file fastcall *fget_light(unsigned int fd, int *fput_needed)
void put_filp(struct file *file)
{
if (rcuref_dec_and_test(&file->f_count)) {
if (atomic_dec_and_test(&file->f_count)) {
security_file_free(file);
file_kill(file);
file_free(file);