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| author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2013-11-12 15:07:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:07 +0900 |
| commit | 58e97ba6b1a0c78d0c847998cf3bcfa5344c19aa (patch) | |
| tree | 7823e9d881d7bcd128d92c72f060a86a31a6bd42 /mm/swapfile.c | |
| parent | 2de1a7e40a30bed83f3da60d8cf0937354d9e7d1 (diff) | |
| download | op-kernel-dev-58e97ba6b1a0c78d0c847998cf3bcfa5344c19aa.zip op-kernel-dev-58e97ba6b1a0c78d0c847998cf3bcfa5344c19aa.tar.gz | |
frontswap: enable call to invalidate area on swapoff
During swapoff the frontswap_map was NULL-ified before calling
frontswap_invalidate_area(). However the frontswap_invalidate_area()
exits early if frontswap_map is NULL. Invalidate was never called
during swapoff.
This patch moves frontswap_map_set() in swapoff just after calling
frontswap_invalidate_area() so outside of locks (swap_lock and
swap_info_struct->lock). This shouldn't be a problem as during swapon
the frontswap_map_set() is called also outside of any locks.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Shaohua Li <shli@fusionio.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 64458e3..612a7c9 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -1924,10 +1924,10 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile) p->cluster_info = NULL; p->flags = 0; frontswap_map = frontswap_map_get(p); - frontswap_map_set(p, NULL); spin_unlock(&p->lock); spin_unlock(&swap_lock); frontswap_invalidate_area(type); + frontswap_map_set(p, NULL); mutex_unlock(&swapon_mutex); free_percpu(p->percpu_cluster); p->percpu_cluster = NULL; |
