[118/272] /proc/kcore: fix seeking

Greg KH
2011-02-16T00:21:31Z

From: Dave Anderson <anderson@redhat.com>

commit ceff1a770933e2ca2bf995b453dade4ec47a9878 upstream.

Commit 34aacb2920 ("procfs: Use generic_file_llseek in /proc/kcore") broke
seeking on /proc/kcore. This changes it back to use default_llseek in
order to restore the original behavior.

The problem with generic_file_llseek is that it only allows seeks up to
inode->i_sb->s_maxbytes, which is 2GB-1 on procfs, where the memory file
offset values in the /proc/kcore PT_LOAD segments may exceed or start
beyond that offset value.

A similar revert was made for /proc/vmcore.

Signed-off-by: Dave Anderson <anderson@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
fs/proc/kcore.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -558,7 +558,7 @@ static int open_kcore(struct inode *inod
static const struct file_operations proc_kcore_operations = {
.read = read_kcore,
.open = open_kcore,
- .llseek = generic_file_llseek,
+ .llseek = default_llseek,
};

#ifdef CONFIG_MEMORY_HOTPLUG