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authorDave Hansen <dave.hansen@linux.intel.com>2014-01-08 20:17:46 -0700
committerJens Axboe <axboe@kernel.dk>2014-01-08 20:17:46 -0700
commit6753471c0cb4562aebb9c70beb74ccd392d49ee8 (patch)
tree3f3d62b47427bcd2104f5b345b27ef93874388b9 /block
parent3d6efbf62c797a2924785f482e4ce8aa8820ec72 (diff)
downloadlinux-6753471c0cb4562aebb9c70beb74ccd392d49ee8.tar.gz
blk-mq: uses page->list incorrectly
'struct page' has two list_head fields: 'lru' and 'list'. Conveniently, they are unioned together. This means that code can use them interchangably, which gets horribly confusing. The blk-mq made the logical decision to try to use page->list. But, that field was actually introduced just for the slub code. ->lru is the right field to use outside of slab/slub. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 68734f87f1d..57039fcd9c9 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1063,8 +1063,8 @@ static void blk_mq_free_rq_map(struct blk_mq_hw_ctx *hctx)
struct page *page;
while (!list_empty(&hctx->page_list)) {
- page = list_first_entry(&hctx->page_list, struct page, list);
- list_del_init(&page->list);
+ page = list_first_entry(&hctx->page_list, struct page, lru);
+ list_del_init(&page->lru);
__free_pages(page, page->private);
}
@@ -1128,7 +1128,7 @@ static int blk_mq_init_rq_map(struct blk_mq_hw_ctx *hctx,
break;
page->private = this_order;
- list_add_tail(&page->list, &hctx->page_list);
+ list_add_tail(&page->lru, &hctx->page_list);
p = page_address(page);
entries_per_page = order_to_size(this_order) / rq_size;