tree a7f76fe1b0cecbc712f0b152ff537805f126b113
parent 67100f255dba284bcbb5ce795355dad1cff35658
author Tsutomu Itoh <t-itoh@jp.fujitsu.com> 1297644329 +0000
committer Chris Mason <chris.mason@oracle.com> 1297718497 -0500

Btrfs: check return value of alloc_extent_map()

I add the check on the return value of alloc_extent_map() to several places.
In addition, alloc_extent_map() returns only the address or NULL.
Therefore, check by IS_ERR() is unnecessary. So, I remove IS_ERR() checking.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>