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zram: remove unnecessary free 

Commit a0c516cbfc ("zram: don't grab mutex in zram_slot_free_noity")
introduced pending zram slot free in zram's write path in case of
missing slot free by memory allocation failure in zram_slot_free_notify
but it is not necessary because we have already freed the slot right
before overwriting.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Jerome Marchand <jmarchan@redhat.com>
Tested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Minchan Kim 2014-01-30 15:46:01 -08:00 committed by Linus Torvalds
parent 9b353db16d
commit 874e3cddc3
1 changed files with 0 additions and 8 deletions
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8
drivers/block/zram/zram_drv.c
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@ -441,14 +441,6 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
goto out;
}
/*
* zram_slot_free_notify could miss free so that let's
* double check.
*/
if (unlikely(meta->table[index].handle ||
zram_test_flag(meta, index, ZRAM_ZERO)))
zram_free_page(zram, index);
ret = lzo1x_1_compress(uncmem, PAGE_SIZE, src, &clen,
meta->compress_workmem);