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authorMinchan Kim <minchan@kernel.org>2017-05-03 14:55:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-03 15:52:11 -0700
commit86c49814d449ebc51c7d455ac8e3d17b9fa702eb (patch)
tree6a4a9bec78dc7596b76ae2bc825d21eb565c3d62 /drivers/block/zram
parentzram: partial IO refactoring (diff)
downloadlinux-dev-86c49814d449ebc51c7d455ac8e3d17b9fa702eb.tar.xz
linux-dev-86c49814d449ebc51c7d455ac8e3d17b9fa702eb.zip
zram: use zram_slot_lock instead of raw bit_spin_lock op
With this clean-up phase, I want to use zram's wrapper function to lock table access which is more consistent with other zram's functions. Link: http://lkml.kernel.org/r/1492052365-16169-4-git-send-email-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block/zram')
-rw-r--r--drivers/block/zram/zram_drv.c41
1 files changed, 27 insertions, 14 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 47e15fec3cd0..aac48ff69618 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -413,24 +413,38 @@ static DEVICE_ATTR_RO(io_stat);
static DEVICE_ATTR_RO(mm_stat);
static DEVICE_ATTR_RO(debug_stat);
+static void zram_slot_lock(struct zram *zram, u32 index)
+{
+ struct zram_meta *meta = zram->meta;
+
+ bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value);
+}
+
+static void zram_slot_unlock(struct zram *zram, u32 index)
+{
+ struct zram_meta *meta = zram->meta;
+
+ bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+}
+
static bool zram_same_page_read(struct zram *zram, u32 index,
struct page *page,
unsigned int offset, unsigned int len)
{
struct zram_meta *meta = zram->meta;
- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_lock(zram, index);
if (unlikely(!meta->table[index].handle) ||
zram_test_flag(meta, index, ZRAM_SAME)) {
void *mem;
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_unlock(zram, index);
mem = kmap_atomic(page);
zram_fill_page(mem + offset, len, meta->table[index].element);
kunmap_atomic(mem);
return true;
}
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_unlock(zram, index);
return false;
}
@@ -446,11 +460,11 @@ static bool zram_same_page_write(struct zram *zram, u32 index,
kunmap_atomic(mem);
/* Free memory associated with this sector now. */
- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_lock(zram, index);
zram_free_page(zram, index);
zram_set_flag(meta, index, ZRAM_SAME);
zram_set_element(meta, index, element);
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_unlock(zram, index);
atomic64_inc(&zram->stats.same_pages);
return true;
@@ -557,7 +571,7 @@ static int zram_decompress_page(struct zram *zram, struct page *page, u32 index)
if (zram_same_page_read(zram, index, page, 0, PAGE_SIZE))
return 0;
- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_lock(zram, index);
handle = meta->table[index].handle;
size = zram_get_obj_size(meta, index);
@@ -576,7 +590,7 @@ static int zram_decompress_page(struct zram *zram, struct page *page, u32 index)
zcomp_stream_put(zram->comp);
}
zs_unmap_object(meta->mem_pool, handle);
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_unlock(zram, index);
/* Should NEVER happen. Return bio error if it does. */
if (unlikely(ret))
@@ -725,11 +739,11 @@ static int __zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index)
* Free memory associated with this sector
* before overwriting unused sectors.
*/
- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_lock(zram, index);
zram_free_page(zram, index);
meta->table[index].handle = handle;
zram_set_obj_size(meta, index, comp_len);
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_unlock(zram, index);
/* Update stats */
atomic64_add(comp_len, &zram->stats.compr_data_size);
@@ -787,7 +801,6 @@ static void zram_bio_discard(struct zram *zram, u32 index,
int offset, struct bio *bio)
{
size_t n = bio->bi_iter.bi_size;
- struct zram_meta *meta = zram->meta;
/*
* zram manages data in physical block size units. Because logical block
@@ -808,9 +821,9 @@ static void zram_bio_discard(struct zram *zram, u32 index,
}
while (n >= PAGE_SIZE) {
- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_lock(zram, index);
zram_free_page(zram, index);
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_unlock(zram, index);
atomic64_inc(&zram->stats.notify_free);
index++;
n -= PAGE_SIZE;
@@ -924,9 +937,9 @@ static void zram_slot_free_notify(struct block_device *bdev,
zram = bdev->bd_disk->private_data;
meta = zram->meta;
- bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_lock(zram, index);
zram_free_page(zram, index);
- bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value);
+ zram_slot_unlock(zram, index);
atomic64_inc(&zram->stats.notify_free);
}