[PATCH v4 08/20] gfs2: use ->invalidatepage() length argument
From: Lukas Czerner <hidden>
Date: 2013-05-14 16:37:22
Also in:
linux-fsdevel, linux-mm, lkml
Subsystem:
filesystems (vfs and infrastructure), gfs2 file system, the rest · Maintainers:
Alexander Viro, Christian Brauner, Andreas Gruenbacher, Linus Torvalds
->invalidatepage() aop now accepts range to invalidate so we can make use of it in gfs2_invalidatepage(). Signed-off-by: Lukas Czerner <redacted> Acked-by: Steven Whitehouse <redacted> Cc: cluster-devel@redhat.com --- fs/gfs2/aops.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 37093ba..ea920bf 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c@@ -947,24 +947,29 @@ static void gfs2_invalidatepage(struct page *page, unsigned int offset, unsigned int length) { struct gfs2_sbd *sdp = GFS2_SB(page->mapping->host); + unsigned int stop = offset + length; + int partial_page = (offset || length < PAGE_CACHE_SIZE); struct buffer_head *bh, *head; unsigned long pos = 0; BUG_ON(!PageLocked(page)); - if (offset == 0) + if (!partial_page) ClearPageChecked(page); if (!page_has_buffers(page)) goto out; bh = head = page_buffers(page); do { + if (pos + bh->b_size > stop) + return; + if (offset <= pos) gfs2_discard(sdp, bh); pos += bh->b_size; bh = bh->b_this_page; } while (bh != head); out: - if (offset == 0) + if (!partial_page) try_to_release_page(page, 0); }
--
1.7.7.6
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