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hostfs: Make hostfs_readpage more readable 

...to make life easier for future readers of that code.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2015-03-03 21:40:55 +01:00
parent 2ad2dca6fd
commit 41761ddfae
1 changed files with 8 additions and 6 deletions
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14
fs/hostfs/hostfs_kern.c
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@ -439,25 +439,27 @@ static int hostfs_readpage(struct file *file, struct page *page)
{
char *buffer;
long long start;
int err = 0;
int bytes_read, ret;
start = (long long) page->index << PAGE_CACHE_SHIFT;
buffer = kmap(page);
err = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer,
bytes_read = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer,
PAGE_CACHE_SIZE);
if (err < 0)
if (bytes_read < 0) {
ret = bytes_read;
goto out;
}
memset(&buffer[err], 0, PAGE_CACHE_SIZE - err);
memset(buffer + bytes_read, 0, PAGE_CACHE_SIZE - bytes_read);
flush_dcache_page(page);
SetPageUptodate(page);
if (PageError(page)) ClearPageError(page);
err = 0;
ret = 0;
out:
kunmap(page);
unlock_page(page);
return err;
return ret;
}
static int hostfs_write_begin(struct file *file, struct address_space *mapping,