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From: Paul Mackerras <paulus@samba.org>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: David Howells <dhowells@redhat.com>,
	torvalds@osdl.org, akpm@osdl.org, davem@davemloft.com,
	matthew@wil.cx, linux-kernel@vger.kernel.org,
	linux-arch@vger.kernel.org
Subject: Re: [PATCH 1/2] WorkStruct: Add assign_bits() to give an atomic-bitops safe assignment
Date: Wed, 13 Dec 2006 10:03:43 +1100	[thread overview]
Message-ID: <17791.13647.329912.557434@cargo.ozlabs.ibm.com> (raw)
In-Reply-To: <20061212225443.GA25902@flint.arm.linux.org.uk>

Russell King writes:

> Why can't we just use atomic_t for this?

On 64-bit platforms, atomic_t tends to be 4 bytes, whereas bitops work
on arrays of unsigned long, i.e. multiples of 8 bytes.  We could
use atomic_long_t for this, however.

Paul.

  reply	other threads:[~2006-12-12 23:04 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-12 20:11 David Howells
2006-12-12 20:11 ` [PATCH 2/2] WorkStruct: Use bitops-safe direct assignment David Howells
2006-12-12 22:54 ` [PATCH 1/2] WorkStruct: Add assign_bits() to give an atomic-bitops safe assignment Russell King
2006-12-12 23:03   ` Paul Mackerras [this message]
2006-12-13  1:36   ` Linus Torvalds
2006-12-13  2:07     ` Nick Piggin
2006-12-13  2:30       ` Linus Torvalds
2006-12-15 22:45       ` Linus Torvalds
2006-12-18  8:56         ` David Woodhouse
2006-12-18  9:05           ` Evgeniy Polyakov
2006-12-18  9:10           ` David Miller
2006-12-12 23:17 ` David Howells

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