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authorChristoph Hellwig <hch@lst.de>2017-09-01 18:39:13 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-09-05 02:05:15 +0300
commitbdd1d2d3d251c65b74ac4493e08db18971c09240 (patch)
tree71df247eeb367203c59a26eed8a384398c2d8131 /fs/read_write.c
parentc41fbad015dabb0a40ecca50c3ff5658eb6471ff (diff)
downloadlinux-bdd1d2d3d251c65b74ac4493e08db18971c09240.tar.xz
fs: fix kernel_read prototype
Use proper ssize_t and size_t types for the return value and count argument, move the offset last and make it an in/out argument like all other read/write helpers, and make the buf argument a void pointer to get rid of lots of casts in the callers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 1ea862bc7efd..9cf1de855b7a 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -415,17 +415,15 @@ ssize_t __vfs_read(struct file *file, char __user *buf, size_t count,
}
EXPORT_SYMBOL(__vfs_read);
-int kernel_read(struct file *file, loff_t offset, char *addr,
- unsigned long count)
+ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
{
mm_segment_t old_fs;
- loff_t pos = offset;
- int result;
+ ssize_t result;
old_fs = get_fs();
set_fs(get_ds());
/* The cast to a user pointer is valid due to the set_fs() */
- result = vfs_read(file, (void __user *)addr, count, &pos);
+ result = vfs_read(file, (void __user *)buf, count, pos);
set_fs(old_fs);
return result;
}