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author | Vishal Moola (Oracle) <vishal.moola@gmail.com> | 2022-08-23 17:40:22 -0700 |
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committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-11 20:26:03 -0700 |
commit | 60aac486daa48d9caa9370d480d890f2a1f71742 (patch) | |
tree | 5525724591dea6d4f3e483c6c891f13bb003b407 /Documentation/fb | |
parent | 24a1efb4a91283c853a31fa4775d5c10c09129a4 (diff) | |
download | linux-60aac486daa48d9caa9370d480d890f2a1f71742.tar.gz linux-60aac486daa48d9caa9370d480d890f2a1f71742.tar.bz2 linux-60aac486daa48d9caa9370d480d890f2a1f71742.zip |
ramfs: convert ramfs_nommu_get_unmapped_area() to use filemap_get_folios_contig()
Convert to use folios throughout. This is in preparation for the removal
for find_get_pages_contig(). Now also supports large folios.
The initial version of this function set the page_address to be returned
after finishing all the checks. Since folio_batches have a maximum of 15
folios, the function had to be modified to support getting and checking up
to lpages, 15 pages at a time while still returning the initial page
address. Now the function sets ret as soon as the first batch arrives,
and updates it only if a check fails.
The physical adjacency check utilizes the page frame numbers. The page
frame number of each folio must be nr_pages away from the first folio.
Link: https://lkml.kernel.org/r/20220824004023.77310-7-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Chris Mason <clm@fb.com>
Cc: David Sterba <dsterba@suse.com>
Cc: David Sterba <dsterb@suse.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation/fb')
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