projects/linux·commit eebd2aa3

Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user

eebd2aa3 · Christoph Lameter <[email protected]> · 2008-02-04 22:28:29 -08:00

Simplify page cache zeroing of segments of pages through 3 functions

zero_user_segments(page, start1, end1, start2, end2)

        Zeros two segments of the page. It takes the position where to
        start and end the zeroing which avoids length calculations and
	makes code clearer.

zero_user_segment(page, start, end)

        Same for a single segment.

zero_user(page, start, length)

        Length variant for the case where we know the length.

We remove the zero_user_page macro. Issues:

1. Its a macro. Inline functions are preferable.

2. The KM_USER0 macro is only defined for HIGHMEM.

   Having to treat this special case everywhere makes the
   code needlessly complex. The parameter for zeroing is always
   KM_USER0 except in one single case that we open code.

Avoiding KM_USER0 makes a lot of code not having to be dealing
with the special casing for HIGHMEM anymore. Dealing with
kmap is only necessary for HIGHMEM configurations. In those
configurations we use KM_USER0 like we do for a series of other
functions defined in highmem.h.

Since KM_USER0 is depends on HIGHMEM the existing zero_user_page
function could not be a macro. zero_user_* functions introduced
here can be be inline because that constant is not used when these
functions are called.

Also extract the flushing of the caches to be outside of the kmap.

[[email protected]: fix nfs and ntfs build]
[[email protected]: fix ntfs build some more]
Signed-off-by: Christoph Lameter <[email protected]>
Cc: Steven French <[email protected]>
Cc: Michael Halcrow <[email protected]>
Cc: <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: "J. Bruce Fields" <[email protected]>
Cc: Anton Altaparmakov <[email protected]>
Cc: Mark Fasheh <[email protected]>
Cc: David Chinner <[email protected]>
Cc: Michael Halcrow <[email protected]>
Cc: Steven French <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: Trond Myklebust <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Commit
eebd2aa355692afaf9906f62118620f1a1c19dbb
Parents
b98348bd

Changes

22 files changed · +103 −116

FileStatusAddDelContent
fs/buffer.cmodified+14−30View file
fs/cifs/inode.cmodified+1−1View file
fs/direct-io.cmodified+2−2View file
fs/ecryptfs/mmap.cmodified+2−3View file
fs/ext3/inode.cmodified+2−2View file
fs/ext4/inode.cmodified+2−2View file
fs/gfs2/bmap.cmodified+1−1View file
fs/gfs2/ops_address.cmodified+1−1View file
fs/libfs.cmodified+4−7View file
fs/mpage.cmodified+2−5View file
fs/nfs/read.cmodified+5−5View file
fs/nfs/write.cmodified+1−3View file
fs/ntfs/aops.cmodified+11−9View file
fs/ntfs/compress.cmodified+1−1View file
fs/ntfs/file.cmodified+15−17View file
fs/ocfs2/alloc.cmodified+1−1View file
fs/ocfs2/aops.cmodified+3−3View file
fs/reiserfs/inode.cmodified+2−2View file
fs/xfs/linux-2.6/xfs_lrw.cmodified+1−1View file
include/linux/highmem.hmodified+30−18View file
mm/filemap_xip.cmodified+1−1View file
mm/truncate.cmodified+1−1View file

Only the first 600 diff lines are shown. Download the complete patch.

fs/buffer.c

View file
diff --git a/fs/buffer.c b/fs/buffer.c
index 456c9ab..1de9214 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1798,7 +1798,7 @@ void page_zero_new_buffers(struct page *page, unsigned from, unsigned to)
start = max(from, block_start);
size = min(to, block_end) - start;
- zero_user_page(page, start, size, KM_USER0);
+ zero_user(page, start, size);
set_buffer_uptodate(bh);
}
@@ -1861,19 +1861,10 @@ static int __block_prepare_write(struct inode *inode, struct page *page,
mark_buffer_dirty(bh);
continue;
}
- if (block_end > to || block_start < from) {
- void *kaddr;
-
- kaddr = kmap_atomic(page, KM_USER0);
- if (block_end > to)
- memset(kaddr+to, 0,
- block_end-to);
- if (block_start < from)
- memset(kaddr+block_start,
- 0, from-block_start);
- flush_dcache_page(page);
- kunmap_atomic(kaddr, KM_USER0);
- }
+ if (block_end > to || block_start < from)
+ zero_user_segments(page,
+ to, block_end,
+ block_start, from);
continue;
}
}
@@ -2104,8 +2095,7 @@ int block_read_full_page(struct page *page, get_block_t *get_block)
SetPageError(page);
}
if (!buffer_mapped(bh)) {
- zero_user_page(page, i * blocksize, blocksize,
- KM_USER0);
+ zero_user(page, i * blocksize, blocksize);
if (!err)
set_buffer_uptodate(bh);
continue;
@@ -2218,7 +2208,7 @@ int cont_expand_zero(struct file *file, struct address_space *mapping,
&page, &fsdata);
if (err)
goto out;
- zero_user_page(page, zerofrom, len, KM_USER0);
+ zero_user(page, zerofrom, len);
err = pagecache_write_end(file, mapping, curpos, len, len,
page, fsdata);
if (err < 0)
@@ -2245,7 +2235,7 @@ int cont_expand_zero(struct file *file, struct address_space *mapping,
&page, &fsdata);
if (err)
goto out;
- zero_user_page(page, zerofrom, len, KM_USER0);
+ zero_user(page, zerofrom, len);
err = pagecache_write_end(file, mapping, curpos, len, len,
page, fsdata);
if (err < 0)
@@ -2422,7 +2412,6 @@ int nobh_write_begin(struct file *file, struct address_space *mapping,
unsigned block_in_page;
unsigned block_start, block_end;
sector_t block_in_file;
- char *kaddr;
int nr_reads = 0;
int ret = 0;
int is_mapped_to_disk = 1;
@@ -2493,13 +2482,8 @@ int nobh_write_begin(struct file *file, struct address_space *mapping,
continue;
}
if (buffer_new(bh) || !buffer_mapped(bh)) {
- kaddr = kmap_atomic(page, KM_USER0);
- if (block_start < from)
- memset(kaddr+block_start, 0, from-block_start);
- if (block_end > to)
- memset(kaddr + to, 0, block_end - to);
- flush_dcache_page(page);
- kunmap_atomic(kaddr, KM_USER0);
+ zero_user_segments(page, block_start, from,
+ to, block_end);
continue;
}
if (buffer_uptodate(bh))
@@ -2636,7 +2620,7 @@ int nobh_writepage(struct page *page, get_block_t *get_block,
* the page size, the remaining memory is zeroed when mapped, and
* writes to that region are not written out to the file."
*/
- zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
+ zero_user_segment(page, offset, PAGE_CACHE_SIZE);
out:
ret = mpage_writepage(page, get_block, wbc);
if (ret == -EAGAIN)
@@ -2709,7 +2693,7 @@ has_buffers:
if (page_has_buffers(page))
goto has_buffers;
}
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
set_page_dirty(page);
err = 0;
@@ -2785,7 +2769,7 @@ int block_truncate_page(struct address_space *mapping,
goto unlock;
}
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
mark_buffer_dirty(bh);
err = 0;
@@ -2831,7 +2815,7 @@ int block_write_full_page(struct page *page, get_block_t *get_block,
* the page size, the remaining memory is zeroed when mapped, and
* writes to that region are not written out to the file."
*/
- zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
+ zero_user_segment(page, offset, PAGE_CACHE_SIZE);
return __block_write_full_page(inode, page, get_block, wbc);
}

fs/cifs/inode.c

View file
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index d9567ba..47f2621 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1386,7 +1386,7 @@ static int cifs_truncate_page(struct address_space *mapping, loff_t from)
if (!page)
return -ENOMEM;
- zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
+ zero_user_segment(page, offset, PAGE_CACHE_SIZE);
unlock_page(page);
page_cache_release(page);
return rc;

fs/direct-io.c

View file
diff --git a/fs/direct-io.c b/fs/direct-io.c
index acf0da1..9e81add 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -878,8 +878,8 @@ do_holes:
page_cache_release(page);
goto out;
}
- zero_user_page(page, block_in_page << blkbits,
- 1 << blkbits, KM_USER0);
+ zero_user(page, block_in_page << blkbits,
+ 1 << blkbits);
dio->block_in_file++;
block_in_page++;
goto next_block;

fs/ecryptfs/mmap.c

View file
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 32c5711..0535412 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -257,8 +257,7 @@ static int fill_zeros_to_end_of_page(struct page *page, unsigned int to)
end_byte_in_page = i_size_read(inode) % PAGE_CACHE_SIZE;
if (to > end_byte_in_page)
end_byte_in_page = to;
- zero_user_page(page, end_byte_in_page,
- PAGE_CACHE_SIZE - end_byte_in_page, KM_USER0);
+ zero_user_segment(page, end_byte_in_page, PAGE_CACHE_SIZE);
out:
return 0;
}
@@ -307,7 +306,7 @@ static int ecryptfs_prepare_write(struct file *file, struct page *page,
*/
if ((i_size_read(page->mapping->host) == prev_page_end_size) &&
(from != 0)) {
- zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_CACHE_SIZE);
}
out:
return rc;

fs/ext3/inode.c

View file
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 9b162cd..0775354 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1845,7 +1845,7 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
*/
if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) &&
ext3_should_writeback_data(inode) && PageUptodate(page)) {
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
set_page_dirty(page);
goto unlock;
}
@@ -1898,7 +1898,7 @@ static int ext3_block_truncate_page(handle_t *handle, struct page *page,
goto unlock;
}
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
BUFFER_TRACE(bh, "zeroed end of block");
err = 0;

fs/ext4/inode.c

View file
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index bb717cb..05c4145 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1840,7 +1840,7 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
*/
if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) &&
ext4_should_writeback_data(inode) && PageUptodate(page)) {
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
set_page_dirty(page);
goto unlock;
}
@@ -1893,7 +1893,7 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
goto unlock;
}
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
BUFFER_TRACE(bh, "zeroed end of block");

fs/gfs2/bmap.c

View file
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index e4effc4..e9456eb 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -932,7 +932,7 @@ static int gfs2_block_truncate_page(struct address_space *mapping)
if (!gfs2_is_writeback(ip))
gfs2_trans_add_bh(ip->i_gl, bh, 0);
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
unlock:
unlock_page(page);

fs/gfs2/ops_address.c

View file
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 38dbe99..ac772b6 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -446,7 +446,7 @@ static int stuffed_readpage(struct gfs2_inode *ip, struct page *page)
* so we need to supply one here. It doesn't happen often.
*/
if (unlikely(page->index)) {
- zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_CACHE_SIZE);
return 0;
}

fs/libfs.c

View file
diff --git a/fs/libfs.c b/fs/libfs.c
index 6e68b70..5523bde 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -341,13 +341,10 @@ int simple_prepare_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
if (!PageUptodate(page)) {
- if (to - from != PAGE_CACHE_SIZE) {
- void *kaddr = kmap_atomic(page, KM_USER0);
- memset(kaddr, 0, from);
- memset(kaddr + to, 0, PAGE_CACHE_SIZE - to);
- flush_dcache_page(page);
- kunmap_atomic(kaddr, KM_USER0);
- }
+ if (to - from != PAGE_CACHE_SIZE)
+ zero_user_segments(page,
+ 0, from,
+ to, PAGE_CACHE_SIZE);
}
return 0;
}

fs/mpage.c

View file
diff --git a/fs/mpage.c b/fs/mpage.c
index d54f8f8..5df5643 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -276,9 +276,7 @@ do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages,
}
if (first_hole != blocks_per_page) {
- zero_user_page(page, first_hole << blkbits,
- PAGE_CACHE_SIZE - (first_hole << blkbits),
- KM_USER0);
+ zero_user_segment(page, first_hole << blkbits, PAGE_CACHE_SIZE);
if (first_hole == 0) {
SetPageUptodate(page);
unlock_page(page);
@@ -571,8 +569,7 @@ page_is_mapped:
if (page->index > end_index || !offset)
goto confused;
- zero_user_page(page, offset, PAGE_CACHE_SIZE - offset,
- KM_USER0);
+ zero_user_segment(page, offset, PAGE_CACHE_SIZE);
}
/*

fs/nfs/read.c

View file
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 8fd6dfb..3d7d963 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -79,7 +79,7 @@ void nfs_readdata_release(void *data)
static
int nfs_return_empty_page(struct page *page)
{
- zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_CACHE_SIZE);
SetPageUptodate(page);
unlock_page(page);
return 0;
@@ -103,10 +103,10 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data)
pglen = PAGE_CACHE_SIZE - base;
for (;;) {
if (remainder <= pglen) {
- zero_user_page(*pages, base, remainder, KM_USER0);
+ zero_user(*pages, base, remainder);
break;
}
- zero_user_page(*pages, base, pglen, KM_USER0);
+ zero_user(*pages, base, pglen);
pages++;
remainder -= pglen;
pglen = PAGE_CACHE_SIZE;
@@ -130,7 +130,7 @@ static int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
return PTR_ERR(new);
}
if (len < PAGE_CACHE_SIZE)
- zero_user_page(page, len, PAGE_CACHE_SIZE - len, KM_USER0);
+ zero_user_segment(page, len, PAGE_CACHE_SIZE);
nfs_list_add_request(new, &one_request);
if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE)
@@ -532,7 +532,7 @@ readpage_async_filler(void *data, struct page *page)
goto out_error;
if (len < PAGE_CACHE_SIZE)
- zero_user_page(page, len, PAGE_CACHE_SIZE - len, KM_USER0);
+ zero_user_segment(page, len, PAGE_CACHE_SIZE);
nfs_pageio_add_request(desc->pgio, new);
return 0;
out_error:

fs/nfs/write.c

View file
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 522efff..b144b19 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -665,9 +665,7 @@ zero_page:
* then we need to zero any uninitalised data. */
if (req->wb_pgbase == 0 && req->wb_bytes != PAGE_CACHE_SIZE
&& !PageUptodate(req->wb_page))
- zero_user_page(req->wb_page, req->wb_bytes,
- PAGE_CACHE_SIZE - req->wb_bytes,
- KM_USER0);
+ zero_user_segment(req->wb_page, req->wb_bytes, PAGE_CACHE_SIZE);
return req;
}

fs/ntfs/aops.c

View file
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c
index ad87cb0..00e9ccd 100644
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -87,13 +87,17 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate)
/* Check for the current buffer head overflowing. */
if (unlikely(file_ofs + bh->b_size > init_size)) {
int ofs;
+ void *kaddr;
ofs = 0;
if (file_ofs < init_size)
ofs = init_size - file_ofs;
local_irq_save(flags);
- zero_user_page(page, bh_offset(bh) + ofs,
- bh->b_size - ofs, KM_BIO_SRC_IRQ);
+ kaddr = kmap_atomic(page, KM_BIO_SRC_IRQ);
+ memset(kaddr + bh_offset(bh) + ofs, 0,
+ bh->b_size - ofs);
+ flush_dcache_page(page);
+ kunmap_atomic(kaddr, KM_BIO_SRC_IRQ);
local_irq_restore(flags);
}
} else {
@@ -334,7 +338,7 @@ handle_hole:
bh->b_blocknr = -1UL;
clear_buffer_mapped(bh);
handle_zblock:
- zero_user_page(page, i * blocksize, blocksize, KM_USER0);
+ zero_user(page, i * blocksize, blocksize);
if (likely(!err))
set_buffer_uptodate(bh);
} while (i++, iblock++, (bh = bh->b_this_page) != head);
@@ -410,7 +414,7 @@ retry_readpage:
/* Is the page fully outside i_size? (truncate in progress) */
if (unlikely(page->index >= (i_size + PAGE_CACHE_SIZE - 1) >>
PAGE_CACHE_SHIFT)) {
- zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_CACHE_SIZE);
ntfs_debug("Read outside i_size - truncated?");
goto done;
}
@@ -459,7 +463,7 @@ retry_readpage:
* ok to ignore the compressed flag here.
*/
if (unlikely(page->index > 0)) {
- zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_CACHE_SIZE);
goto done;
}
if (!NInoAttr(ni))
@@ -788,8 +792,7 @@ lock_retry_remap:
if (err == -ENOENT || lcn == LCN_ENOENT) {
bh->b_blocknr = -1;
clear_buffer_dirty(bh);
- zero_user_page(page, bh_offset(bh), blocksize,
- KM_USER0);
+ zero_user(page, bh_offset(bh), blocksize);
set_buffer_uptodate(bh);
err = 0;
continue;
@@ -1414,8 +1417,7 @@ retry_writepage:
if (page->index >= (i_size >> PAGE_CACHE_SHIFT)) {
/* The page straddles i_size. */
unsigned int ofs = i_size & ~PAGE_CACHE_MASK;
- zero_user_page(page, ofs, PAGE_CACHE_SIZE - ofs,
- KM_USER0);
+ zero_user_segment(page, ofs, PAGE_CACHE_SIZE);
}
/* Handle mst protected attributes. */
if (NInoMstProtected(ni))

fs/ntfs/compress.c

View file
diff --git a/fs/ntfs/compress.c b/fs/ntfs/compress.c
index d1619d0..33ff314 100644
--- a/fs/ntfs/compress.c
+++ b/fs/ntfs/compress.c
@@ -565,7 +565,7 @@ int ntfs_read_compressed_block(struct page *page)
if (xpage >= max_page) {
kfree(bhs);
kfree(pages);
- zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_CACHE_SIZE);
ntfs_debug("Compressed read outside i_size - truncated?");
SetPageUptodate(page);
unlock_page(page);

fs/ntfs/file.c

View file
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 6cd08df..3c5550c 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -607,8 +607,8 @@ do_next_page:
ntfs_submit_bh_for_read(bh);
*wait_bh++ = bh;
} else {
- zero_user_page(page, bh_offset(bh),
- blocksize, KM_USER0);
+ zero_user(page, bh_offset(bh),
+ blocksize);
set_buffer_uptodate(bh);
}
}
@@ -683,9 +683,8 @@ map_buffer_cached:
ntfs_submit_bh_for_read(bh);
*wait_bh++ = bh;
} else {
- zero_user_page(page,
- bh_offset(bh),
- blocksize, KM_USER0);
+ zero_user(page, bh_offset(bh),
+ blocksize);
set_buffer_uptodate(bh);
}
}
@@ -703,8 +702,8 @@ map_buffer_cached:
*/
if (bh_end <= pos || bh_pos >= end) {
if (!buffer_uptodate(bh)) {
- zero_user_page(page, bh_offset(bh),
- blocksize, KM_USER0);
+ zero_user(page, bh_offset(bh),
+ blocksize);
set_buffer_uptodate(bh);
}
mark_buffer_dirty(bh);
@@ -743,8 +742,7 @@ map_buffer_cached:
if (!buffer_uptodate(bh))
set_buffer_uptodate(bh);
} else if (!buffer_uptodate(bh)) {
- zero_user_page(page, bh_offset(bh), blocksize,
- KM_USER0);
+ zero_user(page, bh_offset(bh), blocksize);
set_buffer_uptodate(bh);
}
continue;
@@ -868,8 +866,8 @@ rl_not_mapped_enoent:
if (!buffer_uptodate(bh))
set_buffer_uptodate(bh);
} else if (!buffer_uptodate(bh)) {
- zero_user_page(page, bh_offset(bh),
- blocksize, KM_USER0);
+ zero_user(page, bh_offset(bh),
+ blocksize);
set_buffer_uptodate(bh);
}
continue;
@@ -1128,8 +1126,8 @@ rl_not_mapped_enoent:
if (likely(bh_pos < initialized_size))
ofs = initialized_size - bh_pos;
- zero_user_page(page, bh_offset(bh) + ofs,
- blocksize - ofs, KM_USER0);
+ zero_user_segment(page, bh_offset(bh) + ofs,
+ blocksize);
}
} else /* if (unlikely(!buffer_uptodate(bh))) */
err = -EIO;
@@ -1269,8 +1267,8 @@ rl_not_mapped_enoent:
if (PageUptodate(page))
set_buffer_uptodate(bh);
else {
- zero_user_page(page, bh_offset(bh),
- blocksize, KM_USER0);
+ zero_user(page, bh_offset(bh),
+ blocksize);
set_buffer_uptodate(bh);
}
}
@@ -1330,7 +1328,7 @@ err_out:
len = PAGE_CACHE_SIZE;
if (len > bytes)
len = bytes;
- zero_user_page(*pages, 0, len, KM_USER0);
+ zero_user(*pages, 0, len);
}
goto out;
}
@@ -1451,7 +1449,7 @@ err_out:
len = PAGE_CACHE_SIZE;
if (len > bytes)
len = bytes;
- zero_user_page(*pages, 0, len, KM_USER0);
+ zero_user(*pages, 0, len);
}
goto out;
}

fs/ocfs2/alloc.c

View file
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 64713e1..447206e 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -5670,7 +5670,7 @@ static void ocfs2_map_and_dirty_page(struct inode *inode, handle_t *handle,
mlog_errno(ret);
if (zero)
- zero_user_page(page, from, to - from, KM_USER0);
+ zero_user_segment(page, from, to);
/*
* Need to set the buffers we zero'd into uptodate

fs/ocfs2/aops.c

View file
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index bc7b4cb..8224312 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -307,7 +307,7 @@ static int ocfs2_readpage(struct file *file, struct page *page)
* XXX sys_readahead() seems to get that wrong?
*/
if (start >= i_size_read(inode)) {
- zero_user_page(page, 0, PAGE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_SIZE);
SetPageUptodate(page);
ret = 0;
goto out_alloc;
@@ -869,7 +869,7 @@ int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
if (block_start >= to)
break;
- zero_user_page(page, block_start, bh->b_size, KM_USER0);
+ zero_user(page, block_start, bh->b_size);
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
@@ -1034,7 +1034,7 @@ static void ocfs2_zero_new_buffers(struct page *page, unsigned from, unsigned to
start = max(from, block_start);
end = min(to, block_end);
- zero_user_page(page, start, end - start, KM_USER0);
+ zero_user_segment(page, start, end);
set_buffer_uptodate(bh);
}

fs/reiserfs/inode.c

View file
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 231fd5c..1953098 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2143,7 +2143,7 @@ int reiserfs_truncate_file(struct inode *p_s_inode, int update_timestamps)
/* if we are not on a block boundary */
if (length) {
length = blocksize - length;
- zero_user_page(page, offset, length, KM_USER0);
+ zero_user(page, offset, length);
if (buffer_mapped(bh) && bh->b_blocknr != 0) {
mark_buffer_dirty(bh);
}
@@ -2367,7 +2367,7 @@ static int reiserfs_write_full_page(struct page *page,
unlock_page(page);
return 0;
}
- zero_user_page(page, last_offset, PAGE_CACHE_SIZE - last_offset, KM_USER0);
+ zero_user_segment(page, last_offset, PAGE_CACHE_SIZE);
}
bh = head;

This diff is incomplete. Download the complete patch.

fs/xfs/linux-2.6/xfs_lrw.c

View file

This diff is incomplete. Download the complete patch.

include/linux/highmem.h

View file

This diff is incomplete. Download the complete patch.

mm/filemap_xip.c

View file

This diff is incomplete. Download the complete patch.

mm/truncate.c

View file

This diff is incomplete. Download the complete patch.