AuxXxilium/linux_dsm_epyc7002
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Merge branch 'fast_track' into for_next

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This commit is contained in:
Jan Kara 2012-09-05 16:06:56 +02:00
commit 3f6bba8237
1 changed files with 29 additions and 6 deletions
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33
fs/udf/file.c
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@ -39,20 +39,24 @@
#include "udf_i.h"
#include "udf_sb.h"
static int udf_adinicb_readpage(struct file *file, struct page *page)
static void __udf_adinicb_readpage(struct page *page)
{
struct inode *inode = page->mapping->host;
char *kaddr;
struct udf_inode_info *iinfo = UDF_I(inode);
BUG_ON(!PageLocked(page));
kaddr = kmap(page);
memset(kaddr, 0, PAGE_CACHE_SIZE);
memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, inode->i_size);
memset(kaddr + inode->i_size, 0, PAGE_CACHE_SIZE - inode->i_size);
flush_dcache_page(page);
SetPageUptodate(page);
kunmap(page);
}
static int udf_adinicb_readpage(struct file *file, struct page *page)
{
BUG_ON(!PageLocked(page));
__udf_adinicb_readpage(page);
unlock_page(page);
return 0;
@ -77,6 +81,25 @@ static int udf_adinicb_writepage(struct page *page,
return 0;
}
static int udf_adinicb_write_begin(struct file *file,
struct address_space *mapping, loff_t pos,
unsigned len, unsigned flags, struct page **pagep,
void **fsdata)
{
struct page *page;
if (WARN_ON_ONCE(pos >= PAGE_CACHE_SIZE))
return -EIO;
page = grab_cache_page_write_begin(mapping, 0, flags);
if (!page)
return -ENOMEM;
*pagep = page;
if (!PageUptodate(page) && len != PAGE_CACHE_SIZE)
__udf_adinicb_readpage(page);
return 0;
}
static int udf_adinicb_write_end(struct file *file,
struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
@ -98,7 +121,7 @@ static int udf_adinicb_write_end(struct file *file,
const struct address_space_operations udf_adinicb_aops = {
.readpage = udf_adinicb_readpage,
.writepage = udf_adinicb_writepage,
.write_begin = simple_write_begin,
.write_begin = udf_adinicb_write_begin,
.write_end = udf_adinicb_write_end,
};