Commit de04e769 authored by Rasmus Villemoes's avatar Rasmus Villemoes Committed by Al Viro
Browse files

fs/aio.c: eliminate redundant loads in put_aio_ring_file



Using a local variable we can prevent gcc from reloading
aio_ring_file->f_inode->i_mapping twice, eliminating 2x2 dependent
loads.
Signed-off-by: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent be218aa2
...@@ -274,14 +274,17 @@ __initcall(aio_setup); ...@@ -274,14 +274,17 @@ __initcall(aio_setup);
static void put_aio_ring_file(struct kioctx *ctx) static void put_aio_ring_file(struct kioctx *ctx)
{ {
struct file *aio_ring_file = ctx->aio_ring_file; struct file *aio_ring_file = ctx->aio_ring_file;
struct address_space *i_mapping;
if (aio_ring_file) { if (aio_ring_file) {
truncate_setsize(aio_ring_file->f_inode, 0); truncate_setsize(aio_ring_file->f_inode, 0);
/* Prevent further access to the kioctx from migratepages */ /* Prevent further access to the kioctx from migratepages */
spin_lock(&aio_ring_file->f_inode->i_mapping->private_lock); i_mapping = aio_ring_file->f_inode->i_mapping;
aio_ring_file->f_inode->i_mapping->private_data = NULL; spin_lock(&i_mapping->private_lock);
i_mapping->private_data = NULL;
ctx->aio_ring_file = NULL; ctx->aio_ring_file = NULL;
spin_unlock(&aio_ring_file->f_inode->i_mapping->private_lock); spin_unlock(&i_mapping->private_lock);
fput(aio_ring_file); fput(aio_ring_file);
} }
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment