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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-04-01 15:29:47 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-04-04 10:41:08 -0700
commit09cbfeaf1a5a67bfb3201e0c83c810cecb2efa5a (patch)
tree6cdf210c9c0f981cd22544feeba701892ec19464 /fs/orangefs
parentc05c2ec96bb8b7310da1055c7b9d786a3ec6dc0c (diff)
downloadlinux-09cbfeaf1a5a67bfb3201e0c83c810cecb2efa5a.tar.bz2
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
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. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/orangefs')
-rw-r--r--fs/orangefs/inode.c10
-rw-r--r--fs/orangefs/orangefs-bufmap.c4
-rw-r--r--fs/orangefs/orangefs-utils.c2
3 files changed, 8 insertions, 8 deletions
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index 2382e267b49e..0166faabf8f2 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -18,8 +18,8 @@ static int read_one_page(struct page *page)
int max_block;
ssize_t bytes_read = 0;
struct inode *inode = page->mapping->host;
- const __u32 blocksize = PAGE_CACHE_SIZE; /* inode->i_blksize */
- const __u32 blockbits = PAGE_CACHE_SHIFT; /* inode->i_blkbits */
+ const __u32 blocksize = PAGE_SIZE; /* inode->i_blksize */
+ const __u32 blockbits = PAGE_SHIFT; /* inode->i_blkbits */
struct iov_iter to;
struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
@@ -86,7 +86,7 @@ static int orangefs_readpages(struct file *file,
"failure adding page to cache, read_one_page returned: %d\n",
ret);
} else {
- page_cache_release(page);
+ put_page(page);
}
}
BUG_ON(!list_empty(pages));
@@ -328,7 +328,7 @@ static int orangefs_init_iops(struct inode *inode)
case S_IFREG:
inode->i_op = &orangefs_file_inode_operations;
inode->i_fop = &orangefs_file_operations;
- inode->i_blkbits = PAGE_CACHE_SHIFT;
+ inode->i_blkbits = PAGE_SHIFT;
break;
case S_IFLNK:
inode->i_op = &orangefs_symlink_inode_operations;
@@ -456,7 +456,7 @@ struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
inode->i_uid = current_fsuid();
inode->i_gid = current_fsgid();
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
- inode->i_size = PAGE_CACHE_SIZE;
+ inode->i_size = PAGE_SIZE;
inode->i_rdev = dev;
error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c
index 1f8acc9f9a88..75375e90a63f 100644
--- a/fs/orangefs/orangefs-bufmap.c
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -170,7 +170,7 @@ orangefs_bufmap_unmap(struct orangefs_bufmap *bufmap)
int i;
for (i = 0; i < bufmap->page_count; i++)
- page_cache_release(bufmap->page_array[i]);
+ put_page(bufmap->page_array[i]);
}
static void
@@ -299,7 +299,7 @@ orangefs_bufmap_map(struct orangefs_bufmap *bufmap,
for (i = 0; i < ret; i++) {
SetPageError(bufmap->page_array[i]);
- page_cache_release(bufmap->page_array[i]);
+ put_page(bufmap->page_array[i]);
}
return -ENOMEM;
}
diff --git a/fs/orangefs/orangefs-utils.c b/fs/orangefs/orangefs-utils.c
index 40f5163b56aa..8277aba65e87 100644
--- a/fs/orangefs/orangefs-utils.c
+++ b/fs/orangefs/orangefs-utils.c
@@ -303,7 +303,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int size)
}
break;
case S_IFDIR:
- inode->i_size = PAGE_CACHE_SIZE;
+ inode->i_size = PAGE_SIZE;
orangefs_inode->blksize = (1 << inode->i_blkbits);
spin_lock(&inode->i_lock);
inode_set_bytes(inode, inode->i_size);