Re: [PATCH] Use i8253.c lock for PC speaker on MIPS, too.

[Linus Torvalds <torvalds@linux-foundation.org>]

On Fri, 2 Nov 2007, Ralf Baechle wrote:
>
> The Jazz machines have to use the PIT timer for dyntick and highresolution
> kernels.  This may break because currently just like i386 used to do MIPS
> uses two separate spinlocks in the actual PIT code and the PC speaker
> code.  So switch to do it the same that x86 currently does PIT locking.

Hmm. That leaves apparently just alpha/ppc/powerpc as supporting pcspkr, 
and *not* doing this. Maybe they should be forced to do the i8253 lock in 
arch code too, and expose it through <asm/i8253.h>, instead of having that 
butt-ugly #ifdef remain in the sources?

Paul, Jay, Ivan: right now drivers/input/pcspkr.c does this:

	#if defined(CONFIG_MIPS) || defined(CONFIG_X86)
	/* Use the global PIT lock ! */
	#include <asm/i8253.h>
	#else
	#include <asm/8253pit.h>
	static DEFINE_SPINLOCK(i8253_lock);
	#endif

and wouldn't it be nice if we just changed it to

	#include <asm/i8253.h>

and got rid of one totally unnecessary stupid arch difference?

		Linus