diff options
author | Minchan Kim <minchan@kernel.org> | 2012-06-08 15:39:25 +0900 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-11 08:57:47 -0700 |
commit | c234434835b1f4bad9bdbae6710044cba387c9e5 (patch) | |
tree | 818f9f981e1031f5e2b4f6be35f49faf83db729a /drivers/staging/zram | |
parent | b5b86a4d99f48e5ac28c19ae2a00415e26a7ac1a (diff) | |
download | linux-c234434835b1f4bad9bdbae6710044cba387c9e5.tar.bz2 |
staging: zsmalloc: zsmalloc: use unsigned long instead of void *
We should use unsigned long as handle instead of void * to avoid any
confusion. Without this, users may just treat zs_malloc return value as
a pointer and try to deference it.
This patch passed compile test(zram, zcache and ramster) and zram is
tested on qemu.
changelog
* from v2
- remove hval pointed out by Nitin
- based on next-20120607
* from v1
- change zcache's zv_create return value
- baesd on next-20120604
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>
Acked-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Acked-by: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/zram')
-rw-r--r-- | drivers/staging/zram/zram_drv.c | 16 | ||||
-rw-r--r-- | drivers/staging/zram/zram_drv.h | 2 |
2 files changed, 9 insertions, 9 deletions
diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c index 685d612a627b..abd69d13d0a1 100644 --- a/drivers/staging/zram/zram_drv.c +++ b/drivers/staging/zram/zram_drv.c @@ -135,7 +135,7 @@ static void zram_set_disksize(struct zram *zram, size_t totalram_bytes) static void zram_free_page(struct zram *zram, size_t index) { - void *handle = zram->table[index].handle; + unsigned long handle = zram->table[index].handle; if (unlikely(!handle)) { /* @@ -150,7 +150,7 @@ static void zram_free_page(struct zram *zram, size_t index) } if (unlikely(zram_test_flag(zram, index, ZRAM_UNCOMPRESSED))) { - __free_page(handle); + __free_page((struct page *)handle); zram_clear_flag(zram, index, ZRAM_UNCOMPRESSED); zram_stat_dec(&zram->stats.pages_expand); goto out; @@ -166,7 +166,7 @@ out: zram->table[index].size); zram_stat_dec(&zram->stats.pages_stored); - zram->table[index].handle = NULL; + zram->table[index].handle = 0; zram->table[index].size = 0; } @@ -189,7 +189,7 @@ static void handle_uncompressed_page(struct zram *zram, struct bio_vec *bvec, unsigned char *user_mem, *cmem; user_mem = kmap_atomic(page); - cmem = kmap_atomic(zram->table[index].handle); + cmem = kmap_atomic((struct page *)zram->table[index].handle); memcpy(user_mem + bvec->bv_offset, cmem + offset, bvec->bv_len); kunmap_atomic(cmem); @@ -317,7 +317,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, int ret; u32 store_offset; size_t clen; - void *handle; + unsigned long handle; struct zobj_header *zheader; struct page *page, *page_store; unsigned char *user_mem, *cmem, *src, *uncmem = NULL; @@ -399,7 +399,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, store_offset = 0; zram_set_flag(zram, index, ZRAM_UNCOMPRESSED); zram_stat_inc(&zram->stats.pages_expand); - handle = page_store; + handle = (unsigned long)page_store; src = kmap_atomic(page); cmem = kmap_atomic(page_store); goto memstore; @@ -592,12 +592,12 @@ void __zram_reset_device(struct zram *zram) /* Free all pages that are still in this zram device */ for (index = 0; index < zram->disksize >> PAGE_SHIFT; index++) { - void *handle = zram->table[index].handle; + unsigned long handle = zram->table[index].handle; if (!handle) continue; if (unlikely(zram_test_flag(zram, index, ZRAM_UNCOMPRESSED))) - __free_page(handle); + __free_page((struct page *)handle); else zs_free(zram->mem_pool, handle); } diff --git a/drivers/staging/zram/zram_drv.h b/drivers/staging/zram/zram_drv.h index fbe8ac98704c..7a7e25664826 100644 --- a/drivers/staging/zram/zram_drv.h +++ b/drivers/staging/zram/zram_drv.h @@ -81,7 +81,7 @@ enum zram_pageflags { /* Allocated for each disk page */ struct table { - void *handle; + unsigned long handle; u16 size; /* object size (excluding header) */ u8 count; /* object ref count (not yet used) */ u8 flags; |