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vfs: __read_cache_page should use gfp argument rather than GFP_KERNEL 

lockdep reports a deadlock in jfs because a special inode's rw semaphore
is taken recursively.  The mapping's gfp mask is GFP_NOFS, but is not
used when __read_cache_page() calls add_to_page_cache_lru().

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dave Kleikamp 2011-12-21 11:05:48 -06:00 committed by Linus Torvalds
parent 7b21a202b8
commit e6f67b8c05
1 changed files with 2 additions and 5 deletions
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7
mm/filemap.c
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@ -1828,7 +1828,7 @@ repeat:
page = __page_cache_alloc(gfp | __GFP_COLD);
if (!page)
return ERR_PTR(-ENOMEM);
err = add_to_page_cache_lru(page, mapping, index, GFP_KERNEL);
err = add_to_page_cache_lru(page, mapping, index, gfp);
if (unlikely(err)) {
page_cache_release(page);
if (err == -EEXIST)
@ -1925,10 +1925,7 @@ static struct page *wait_on_page_read(struct page *page)
* @gfp: the page allocator flags to use if allocating
*
* This is the same as "read_mapping_page(mapping, index, NULL)", but with
* any new page allocations done using the specified allocation flags. Note
* that the Radix tree operations will still use GFP_KERNEL, so you can't
* expect to do this atomically or anything like that - but you can pass in
* other page requirements.
* any new page allocations done using the specified allocation flags.
*
* If the page does not get brought uptodate, return -EIO.
*/