diff options
author | Andrew Morton <akpm@linux-foundation.org> | 2007-05-10 10:15:18 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-10 16:26:52 (GMT) |
commit | 218e180e7ea5334e1f94121940ba82cd1f0f4e58 (patch) | |
tree | 5b7aa47a2439c40b8b68a3bfd9e2f72bf07cf385 /fs/afs | |
parent | 894b8788d7f265eb7c6f75a9a77cedeb48f51586 (diff) | |
download | linux-218e180e7ea5334e1f94121940ba82cd1f0f4e58.tar.xz |
add upper-32-bits macro
We keep on getting "right shift count >= width of type" warnings when doing
things like
sector_t s;
x = s >> 56;
because with CONFIG_LBD=n, s is only 32-bit. Similar problems can occur with
dma_addr_t's.
So add a simple wrapper function which code can use to avoid this warning.
The above example would become
x = upper_32_bits(s) >> 24;
The first user is in fact AFS.
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Cc: "Cameron, Steve" <Steve.Cameron@hp.com>
Cc: "Miller, Mike (OS Dev)" <Mike.Miller@hp.com>
Cc: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/afs')
0 files changed, 0 insertions, 0 deletions