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zram: remove bio parameter from zram_bvec_rw()

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Recently rw_page block device operation has been added.  This patchset
implements rw_page operation for zram block device and does some clean-up.

This patch (of 3):

Remove an unnecessary parameter(bio) from zram_bvec_rw() and
zram_bvec_read().  zram_bvec_read() doesn't use a bio parameter, so remove
it.  zram_bvec_rw() calls a read/write operation not using bio, so a rw
parameter replaces a bio parameter.

Signed-off-by: karam.lee <karam.lee@lge.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: <seungho1.park@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
karam.lee 2014-12-12 16:56:47 -08:00 committed by Linus Torvalds
parent 9eec4cd53f
commit b627cff3d3
1 changed files with 8 additions and 8 deletions
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16
drivers/block/zram/zram_drv.c
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@ -453,7 +453,7 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index)
} }
static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec, static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,
u32 index, int offset, struct bio *bio) u32 index, int offset)
{ {
int ret; int ret;
struct page *page; struct page *page;
@ -645,14 +645,13 @@ out:
} }
static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index, static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
int offset, struct bio *bio) int offset, int rw)
{ {
int ret; int ret;
int rw = bio_data_dir(bio);
if (rw == READ) { if (rw == READ) {
atomic64_inc(&zram->stats.num_reads); atomic64_inc(&zram->stats.num_reads);
ret = zram_bvec_read(zram, bvec, index, offset, bio); ret = zram_bvec_read(zram, bvec, index, offset);
} else { } else {
atomic64_inc(&zram->stats.num_writes); atomic64_inc(&zram->stats.num_writes);
ret = zram_bvec_write(zram, bvec, index, offset); ret = zram_bvec_write(zram, bvec, index, offset);
@ -853,7 +852,7 @@ out:
static void __zram_make_request(struct zram *zram, struct bio *bio) static void __zram_make_request(struct zram *zram, struct bio *bio)
{ {
int offset; int offset, rw;
u32 index; u32 index;
struct bio_vec bvec; struct bio_vec bvec;
struct bvec_iter iter; struct bvec_iter iter;
@ -868,6 +867,7 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
return; return;
} }
rw = bio_data_dir(bio);
bio_for_each_segment(bvec, bio, iter) { bio_for_each_segment(bvec, bio, iter) {
int max_transfer_size = PAGE_SIZE - offset; int max_transfer_size = PAGE_SIZE - offset;
@ -882,15 +882,15 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
bv.bv_len = max_transfer_size; bv.bv_len = max_transfer_size;
bv.bv_offset = bvec.bv_offset; bv.bv_offset = bvec.bv_offset;
if (zram_bvec_rw(zram, &bv, index, offset, bio) < 0) if (zram_bvec_rw(zram, &bv, index, offset, rw) < 0)
goto out; goto out;
bv.bv_len = bvec.bv_len - max_transfer_size; bv.bv_len = bvec.bv_len - max_transfer_size;
bv.bv_offset += max_transfer_size; bv.bv_offset += max_transfer_size;
if (zram_bvec_rw(zram, &bv, index + 1, 0, bio) < 0) if (zram_bvec_rw(zram, &bv, index + 1, 0, rw) < 0)
goto out; goto out;
} else } else
if (zram_bvec_rw(zram, &bvec, index, offset, bio) < 0) if (zram_bvec_rw(zram, &bvec, index, offset, rw) < 0)
goto out; goto out;
update_position(&index, &offset, &bvec); update_position(&index, &offset, &bvec);