On Sun, Nov 26, 2006 at 03:06:10PM -0800, Linus Torvalds wrote:
> That said, Alexey did check it more than most patches like this get
> checked (ie checking allmodconfig on i386, x86_64, alpha, arm), so it's a
> bit unlucky that MIPS got bitten by this - it was not a badly tested
> patch per se.
>
> Does the obvious fix (to include <linux/kernel.h> in irqflags.h) fix it
> for you?
It changes the sympthoms:
CC arch/mips/kernel/asm-offsets.s
In file included from include/linux/irqflags.h:14,
from include/asm/bitops.h:34,
from include/linux/bitops.h:9,
from include/linux/thread_info.h:20,
from include/linux/preempt.h:9,
from include/linux/spinlock.h:49,
from include/linux/capability.h:45,
from include/linux/sched.h:46,
from arch/mips/kernel/asm-offsets.c:13:
include/linux/kernel.h: In function ‘roundup_pow_of_two’:
include/linux/kernel.h:169: warning: implicit declaration of function ‘fls_long’
In file included from include/linux/thread_info.h:20,
from include/linux/preempt.h:9,
from include/linux/spinlock.h:49,
from include/linux/capability.h:45,
from include/linux/sched.h:46,
from arch/mips/kernel/asm-offsets.c:13:
include/linux/bitops.h: At top level:
include/linux/bitops.h:57: error: conflicting types for ‘fls_long’
include/linux/kernel.h:169: error: previous implicit declaration of ‘fls_long’
was here
So the new problem is circular includes:
... <linux/bitops.h> -> <asm/bitops.h> -> <linux/irqflags.h> ->
<linux/kernel.h> -> <linux/bitops.h> ...
include/asm-mips/bitops.h needs to include irqflags because some older
MIPS variants do not have any atomic instructions. So the fix needs to
to break that loop.
Ralf
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