[PATCH] mark IS_ERR as unlikely()

[PATCH] mark IS_ERR as unlikely()

It seems fair to assume that it is always unlikely that IS_ERR will return
true.

This patch changes the gcc-3.4-generated kernel text by ~500 bytes (less) so
it's fair to assume that the compiler is indeed propagating unlikeliness out
of inline functions.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>