The quilt patch titled
Subject: gfs2: convert gfs2_getbuf() to folios
has been removed from the -mm tree. Its filename was
gfs2-convert-gfs2_getbuf-to-folios.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: gfs2: convert gfs2_getbuf() to folios
Date: Mon, 16 Oct 2023 21:10:54 +0100
Remove several folio->page->folio conversions. Also use __GFP_NOFAIL
instead of calling yield() and the new get_nth_bh().
Link: https://lkml.kernel.org/r/20231016201114.1928083-8-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Cc: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
Cc: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/gfs2/meta_io.c | 39 +++++++++++++++++----------------------
1 file changed, 17 insertions(+), 22 deletions(-)
--- a/fs/gfs2/meta_io.c~gfs2-convert-gfs2_getbuf-to-folios
+++ a/fs/gfs2/meta_io.c
@@ -115,7 +115,7 @@ struct buffer_head *gfs2_getbuf(struct g
{
struct address_space *mapping = gfs2_glock2aspace(gl);
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
- struct page *page;
+ struct folio *folio;
struct buffer_head *bh;
unsigned int shift;
unsigned long index;
@@ -129,36 +129,31 @@ struct buffer_head *gfs2_getbuf(struct g
bufnum = blkno - (index << shift); /* block buf index within page */
if (create) {
- for (;;) {
- page = grab_cache_page(mapping, index);
- if (page)
- break;
- yield();
- }
- if (!page_has_buffers(page))
- create_empty_buffers(page, sdp->sd_sb.sb_bsize, 0);
+ folio = __filemap_get_folio(mapping, index,
+ FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
+ mapping_gfp_mask(mapping) | __GFP_NOFAIL);
+ bh = folio_buffers(folio);
+ if (!bh)
+ bh = folio_create_empty_buffers(folio,
+ sdp->sd_sb.sb_bsize, 0);
} else {
- page = find_get_page_flags(mapping, index,
- FGP_LOCK|FGP_ACCESSED);
- if (!page)
+ folio = __filemap_get_folio(mapping, index,
+ FGP_LOCK | FGP_ACCESSED, 0);
+ if (IS_ERR(folio))
return NULL;
- if (!page_has_buffers(page)) {
- bh = NULL;
- goto out_unlock;
- }
+ bh = folio_buffers(folio);
}
- /* Locate header for our buffer within our page */
- for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page)
- /* Do nothing */;
- get_bh(bh);
+ if (!bh)
+ goto out_unlock;
+ bh = get_nth_bh(bh, bufnum);
if (!buffer_mapped(bh))
map_bh(bh, sdp->sd_vfs, blkno);
out_unlock:
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
return bh;
}
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
