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-rw-r--r--fs/buffer.c15
1 files changed, 3 insertions, 12 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 6fa530256bfd..c9c266db0624 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2893,7 +2893,7 @@ int block_write_full_page_endio(struct page *page, get_block_t *get_block,
2893 2893
2894 /* 2894 /*
2895 * The page straddles i_size. It must be zeroed out on each and every 2895 * The page straddles i_size. It must be zeroed out on each and every
2896 * writepage invokation because it may be mmapped. "A file is mapped 2896 * writepage invocation because it may be mmapped. "A file is mapped
2897 * in multiples of the page size. For a file that is not a multiple of 2897 * in multiples of the page size. For a file that is not a multiple of
2898 * the page size, the remaining memory is zeroed when mapped, and 2898 * the page size, the remaining memory is zeroed when mapped, and
2899 * writes to that region are not written out to the file." 2899 * writes to that region are not written out to the file."
@@ -3265,7 +3265,7 @@ static void recalc_bh_state(void)
3265 3265
3266struct buffer_head *alloc_buffer_head(gfp_t gfp_flags) 3266struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
3267{ 3267{
3268 struct buffer_head *ret = kmem_cache_alloc(bh_cachep, gfp_flags); 3268 struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags);
3269 if (ret) { 3269 if (ret) {
3270 INIT_LIST_HEAD(&ret->b_assoc_buffers); 3270 INIT_LIST_HEAD(&ret->b_assoc_buffers);
3271 get_cpu_var(bh_accounting).nr++; 3271 get_cpu_var(bh_accounting).nr++;
@@ -3352,15 +3352,6 @@ int bh_submit_read(struct buffer_head *bh)
3352} 3352}
3353EXPORT_SYMBOL(bh_submit_read); 3353EXPORT_SYMBOL(bh_submit_read);
3354 3354
3355static void
3356init_buffer_head(void *data)
3357{
3358 struct buffer_head *bh = data;
3359
3360 memset(bh, 0, sizeof(*bh));
3361 INIT_LIST_HEAD(&bh->b_assoc_buffers);
3362}
3363
3364void __init buffer_init(void) 3355void __init buffer_init(void)
3365{ 3356{
3366 int nrpages; 3357 int nrpages;
@@ -3369,7 +3360,7 @@ void __init buffer_init(void)
3369 sizeof(struct buffer_head), 0, 3360 sizeof(struct buffer_head), 0,
3370 (SLAB_RECLAIM_ACCOUNT|SLAB_PANIC| 3361 (SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|
3371 SLAB_MEM_SPREAD), 3362 SLAB_MEM_SPREAD),
3372 init_buffer_head); 3363 NULL);
3373 3364
3374 /* 3365 /*
3375 * Limit the bh occupancy to 10% of ZONE_NORMAL 3366 * Limit the bh occupancy to 10% of ZONE_NORMAL