Re: [patch] Re: using long instead of atomic_t when only set/read is required

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To: Nick Piggin <nickpiggin@...>
Cc: Alan Cox <alan@...>, Alan Stern <stern@...>, Pavel Machek <pavel@...>, Linus Torvalds <torvalds@...>, Andrew Morton <akpm@...>, Zdenek Kabelac <zdenek.kabelac@...>, <davem@...>, Rafael J. Wysocki <rjw@...>, Pierre Ossman <drzeus-mmc@...>, Kernel development list <linux-kernel@...>, pm list <linux-pm@...>
Date: Monday, March 3, 2008 - 1:31 pm

On Tue, Mar 04, 2008 at 04:16:33AM +1100, Nick Piggin wrote:

It is true that gcc can refetch pointers/ints if it runs out of registers,
which is why rcu_dereference() recently had an ACCESS_ONCE() added to it.

But such refetching cannot result in a mish-mash of two different
pointer values, confusing though it might be to the affected code.

						Thanx, Paul
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Messages in current thread:
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Wed Feb 20, 6:15 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Wed Feb 20, 8:02 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Thu Feb 21, 12:38 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Thu Feb 21, 6:47 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Fri Feb 22, 9:30 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sat Feb 23, 4:16 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sat Feb 23, 8:19 pm)
Re: [linux-pm] [Bug 10030] Suspend doesn't work when SD card..., Rafael J. Wysocki, (Sun Feb 24, 10:00 am)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Mon Feb 25, 7:40 am)
Re: [patch] Re: using long instead of atomic_t when only set..., Paul E. McKenney, (Mon Mar 3, 1:31 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sun Feb 24, 6:21 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Mon Feb 25, 7:41 am)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sun Feb 24, 9:51 am)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sun Feb 24, 4:09 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sun Feb 24, 9:33 am)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sun Feb 24, 4:25 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sun Feb 24, 4:56 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Sun Feb 24, 6:18 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Wed Feb 20, 6:41 pm)
Re: [Bug 10030] Suspend doesn't work when SD card is inserted, Rafael J. Wysocki, (Wed Feb 20, 4:58 pm)