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Date: Wed, 23 Apr 2008 09:18:40 +0200 From: Jens Axboe <jens.axboe@...cle.com> To: Ralf Baechle <ralf@...ux-mips.org> Cc: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org, npiggin@...e.de, torvalds@...ux-foundation.org, peterz@...radead.org, sam@...nborg.org Subject: Re: [PATCH 8/11] mips: convert to generic helpers for IPI function calls On Wed, Apr 23 2008, Ralf Baechle wrote: > On Tue, Apr 22, 2008 at 08:50:24PM +0200, Jens Axboe wrote: > > > This converts mips to use the new helpers for smp_call_function() and > > friends, and adds support for smp_call_function_single(). Not tested, > > but it compiles. > > > > Cc: Ralf Baechle <ralf@...ux-mips.org> > > Signed-off-by: Jens Axboe <jens.axboe@...cle.com> > > --- > > arch/mips/Kconfig | 1 + > > arch/mips/kernel/smp-mt.c | 27 ++++++++- > > arch/mips/kernel/smp.c | 133 +++------------------------------------- > > arch/mips/kernel/smtc.c | 7 ++ > > arch/mips/sibyte/bcm1480/smp.c | 3 + > > arch/mips/sibyte/sb1250/smp.c | 2 + > > include/asm-mips/smp.h | 12 +--- > > 7 files changed, 49 insertions(+), 136 deletions(-) > > > > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > > index 8724ed3..5092a9e 100644 > > --- a/arch/mips/Kconfig > > +++ b/arch/mips/Kconfig > > @@ -1742,6 +1742,7 @@ config SMP > > bool "Multi-Processing support" > > depends on SYS_SUPPORTS_SMP > > select IRQ_PER_CPU > > + select USE_GENERIC_SMP_HELPERS > > help > > This enables support for systems with more than one CPU. If you have > > a system with only one CPU, like most personal computers, say N. If > > diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c > > index 89e6f6a..31049fc 100644 > > --- a/arch/mips/kernel/smp-mt.c > > +++ b/arch/mips/kernel/smp-mt.c > > @@ -38,8 +38,9 @@ > > > > #define MIPS_CPU_IPI_RESCHED_IRQ 0 > > #define MIPS_CPU_IPI_CALL_IRQ 1 > > +#define MIPS_CPU_IPI_CALL_SINGLE_IRQ 2 > > The smp-mt.c has no chance of working. There are only two hardware > interrupts available so just using one more won't quite work. But I like > the basic idea of this patch series. I'll switch mips over to sharing the IPI for both ipi function calls then, thanks Ralf! -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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