[PATCHv2 09/24] sys_swapon: remove did_down variable
From: Cesar Eduardo Barros <hidden>
Date: 2011-03-01 23:29:02
Subsystem:
memory management, memory management - swap, the rest · Maintainers:
Andrew Morton, Chris Li, Kairui Song, Linus Torvalds
Since mutex_lock(&inode->i_mutex) is called just after setting inode, did_down is always equivalent to (inode && S_ISREG(inode->i_mode)). Use this fact to remove the did_down variable. Signed-off-by: Cesar Eduardo Barros <redacted> --- mm/swapfile.c | 4 +--- 1 files changed, 1 insertions(+), 3 deletions(-)
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 55a50ef..c655389 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c@@ -1907,7 +1907,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) unsigned char *swap_map = NULL; struct page *page = NULL; struct inode *inode = NULL; - int did_down = 0; if (!capable(CAP_SYS_ADMIN)) return -EPERM;
@@ -1962,7 +1961,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) } else if (S_ISREG(inode->i_mode)) { p->bdev = inode->i_sb->s_bdev; mutex_lock(&inode->i_mutex); - did_down = 1; if (IS_SWAPFILE(inode)) { error = -EBUSY; goto bad_swap;
@@ -2163,7 +2161,7 @@ out: } if (name) putname(name); - if (did_down) { + if (inode && S_ISREG(inode->i_mode)) { if (!error) inode->i_flags |= S_SWAPFILE; mutex_unlock(&inode->i_mutex);
--
1.7.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>