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authorAndrew Morton <akpm@linux-foundation.org>2007-05-10 03:15:18 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-10 09:26:52 -0700
commit218e180e7ea5334e1f94121940ba82cd1f0f4e58 (patch)
tree5b7aa47a2439c40b8b68a3bfd9e2f72bf07cf385 /fs/afs/afs_fs.h
parent894b8788d7f265eb7c6f75a9a77cedeb48f51586 (diff)
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/afs_fs.h')
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