Re: [tip:x86/build] x86/build: Remove -Wno-sign-compare

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxxxxx> wrote:

> Here's the full list of warnings for allmod64:
> 
> make bzImage:
> 
>  include/linux/blkdev.h:624:26: warning: switch condition has boolean value [-Wswitch-bool]
>  ./arch/x86/include/asm/qspinlock.h:28:2: warning: implicit declaration of function ?pv_queued_spin_lock_slowpath? [-Wimplicit-function-declaration]
>  ./arch/x86/include/asm/qspinlock.h:33:2: warning: implicit declaration of function ?pv_queued_spin_unlock? [-Wimplicit-function-declaration]
>  ./arch/x86/include/asm/qspinlock.h:28:2: warning: implicit declaration of function ?pv_queued_spin_lock_slowpath? [-Wimplicit-function-declaration]
>  ./arch/x86/include/asm/qspinlock.h:33:2: warning: implicit declaration of function ?pv_queued_spin_unlock? [-Wimplicit-function-declaration]
>  ./arch/x86/include/asm/qspinlock.h:28:2: warning: implicit declaration of function ?pv_queued_spin_lock_slowpath? [-Wimplicit-function-declaration]
>  ./arch/x86/include/asm/qspinlock.h:33:2: warning: implicit declaration of function ?pv_queued_spin_unlock? [-Wimplicit-function-declaration]
>  ./arch/x86/include/asm/qspinlock.h:28:2: warning: implicit declaration of function ?pv_queued_spin_lock_slowpath? [-Wimplicit-function-declaration]
>  ./arch/x86/include/asm/qspinlock.h:33:2: warning: implicit declaration of function ?pv_queued_spin_unlock? [-Wimplicit-function-declaration]

And that comes from tip:locking/core, but those warnings do not show 
up with GCC 4.9.2: so it's either a GCC 5.0.1 bug, or we missed 
something with the WIP queued pv spinlocks changes that newer GCC is 
able to notice.

Thanks,

	Ingo
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