From: Paul Mackerras <paulus@samba.org>
To: akpm@osdl.org, viro@parcelfarce.linux.theplanet.co.uk
Cc: Olof Johansson <olof@austin.ibm.com>, linux-kernel@vger.kernel.org
Subject: Alignment of bitmaps for ext2_set_bit et al.
Date: Thu, 19 Aug 2004 21:16:13 +1000 [thread overview]
Message-ID: <16676.35837.215958.814591@cargo.ozlabs.ibm.com> (raw)
What can we assume about the alignment of the bitmap pointer passed to
the ext2_{set,clear}_bit_atomic functions? Can we assume that they
will be aligned to an long boundary (8 bytes on 64-bit)?
Olof has made a patch that uses atomics for these on ppc64 rather than
locking and unlocking a lock, but it will only work correctly if the
bitmap is always 8-byte aligned.
Paul.
next reply other threads:[~2004-08-19 11:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-19 11:16 Paul Mackerras [this message]
2004-08-19 11:22 ` Andrew Morton
2004-08-19 14:42 ` David S. Miller
2004-08-19 20:39 ` Olof Johansson
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