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staging: zcache: fix cleancache crash 

After commit c5f5c4db39 ("staging: zcache: fix crash on high memory
swap") cleancache crashes on the first successful get.  This was caused
by a remaining virt_to_page() call in zcache_pampd_get_data_and_free()
that only gets run in the cleancache path.

The patch converts the virt_to_page() to struct page casting like was
done for other instances in c5f5c4db39.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Tested-By: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Seth Jennings 2011-09-20 13:09:56 -07:00 committed by Linus Torvalds
parent 2838888f3f
commit 80976804f5
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/zcache/zcache-main.c
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@ -1242,7 +1242,7 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *bufsize, bool raw,
int ret = 0;
BUG_ON(!is_ephemeral(pool));
zbud_decompress(virt_to_page(data), pampd);
zbud_decompress((struct page *)(data), pampd);
zbud_free_and_delist((struct zbud_hdr *)pampd);
atomic_dec(&zcache_curr_eph_pampd_count);
return ret;