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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-04-04 10:50:24 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-04-04 10:50:24 -0700 |
commit | 4a2d057e4fc4f9ebd32351837c14c10a0773b956 (patch) | |
tree | b0ed0187a6839ebed4982fe7589b410222fd4b9a /Documentation/filesystems/vfs.txt | |
parent | 9735a22799b9214d17d3c231fe377fc852f042e9 (diff) | |
parent | 1fa64f198b9f8d6ec0f7aec7c18dc94684391140 (diff) | |
download | linux-4a2d057e4fc4f9ebd32351837c14c10a0773b956.tar.gz linux-4a2d057e4fc4f9ebd32351837c14c10a0773b956.tar.bz2 linux-4a2d057e4fc4f9ebd32351837c14c10a0773b956.zip |
Merge branch 'PAGE_CACHE_SIZE-removal'
Merge PAGE_CACHE_SIZE removal patches from Kirill Shutemov:
"PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.
This promise never materialized. And unlikely will.
Let's stop pretending that pages in page cache are special. They are
not.
The first patch with most changes has been done with coccinelle. The
second is manual fixups on top.
The third patch removes macros definition"
[ I was planning to apply this just before rc2, but then I spaced out,
so here it is right _after_ rc2 instead.
As Kirill suggested as a possibility, I could have decided to only
merge the first two patches, and leave the old interfaces for
compatibility, but I'd rather get it all done and any out-of-tree
modules and patches can trivially do the converstion while still also
working with older kernels, so there is little reason to try to
maintain the redundant legacy model. - Linus ]
* PAGE_CACHE_SIZE-removal:
mm: drop PAGE_CACHE_* and page_cache_{get,release} definition
mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
Diffstat (limited to 'Documentation/filesystems/vfs.txt')
-rw-r--r-- | Documentation/filesystems/vfs.txt | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index b02a7d598258..4164bd6397a2 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -708,9 +708,9 @@ struct address_space_operations { from the address space. This generally corresponds to either a truncation, punch hole or a complete invalidation of the address space (in the latter case 'offset' will always be 0 and 'length' - will be PAGE_CACHE_SIZE). Any private data associated with the page + will be PAGE_SIZE). Any private data associated with the page should be updated to reflect this truncation. If offset is 0 and - length is PAGE_CACHE_SIZE, then the private data should be released, + length is PAGE_SIZE, then the private data should be released, because the page must be able to be completely discarded. This may be done by calling the ->releasepage function, but in this case the release MUST succeed. |