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Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout regardless of the endian

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout regardless of the endian
Date 2016-07-14 11:50 +0200
Message-ID <rULrj-7WZ-5@gated-at.bofh.it> (permalink)
References <rM0SB-4FY-19@gated-at.bofh.it> <rUyu5-7yz-11@gated-at.bofh.it> <rUJzb-6C2-13@gated-at.bofh.it> <rULhE-7Tt-13@gated-at.bofh.it>
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On Thu, Jul 14, 2016 at 11:37:33AM +0200, Peter Zijlstra wrote:
> static inline u8 *__qspinlock_lock_byte(struct qspinlock *lock)
> {
> 	return (u8 *)lock + 3 * IS_BUILTIN(__BIG_ENDIAN);
> }

Bugger, that doesn't actually work. IS_BUILTIN expects the symbol to be
defined to "1" and __BIG_ENDIAN is not (its "4321").

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Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout  regardless of the endian Peter Zijlstra <peterz@infradead.org> - 2016-07-13 22:00 +0200
  Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout  regardless of the endian Peter Zijlstra <peterz@infradead.org> - 2016-07-13 22:50 +0200
  Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout regardless  of the endian xinhui <xinhui.pan@linux.vnet.ibm.com> - 2016-07-14 09:50 +0200
    Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout  regardless of the endian Peter Zijlstra <peterz@infradead.org> - 2016-07-14 11:40 +0200
      Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout  regardless of the endian Peter Zijlstra <peterz@infradead.org> - 2016-07-14 11:50 +0200
        Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout  regardless of the endian Boqun Feng <boqun.feng@gmail.com> - 2016-07-15 02:40 +0200
      Re: [PATCH v3] locking/qrwlock: Let qrwlock has same layout  regardless of the endian panxinhui <xinhui@linux.vnet.ibm.com> - 2016-07-15 08:30 +0200

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