tree 8c62c8665e343be25cb1d351a0cc4075f70e7241
parent bbcdac0c20aa20d1daad41d9c138102b70e5aae4
author Thomas Tuttle <ttuttle@google.com> 1212731218 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1212776953 -0700

pagemap: return EINVAL, not EIO, for unaligned reads of kpagecount or kpageflags

If the user tries to read from a position that is not a multiple of 8, or
read a number of bytes that is not a multiple of 8, they have passed an
invalid argument to read, for the purpose of reading these files.  It's
not an IO error because we didn't encounter any trouble finding the data
they asked for.

Signed-off-by: Thomas Tuttle <ttuttle@google.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>