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powerpc: Make SPARSE_IRQ required

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All IRQs on powerpc are managed via irq_domain anyway, there isn't really
any advantage to turning SPARSE_IRQ off, and it's the direction we want
to take the kernel design anyway.  This patch makes powerpc always use
SPARSE_IRQ.

On pseries_defconfig, SPARSE_IRQ adds only about 0x300 bytes to the
.text sections, and removes about 0x20000 from the data section for the
static irq_desc table.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Ben Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Grant Likely 2012-01-30 08:02:19 +00:00 • committed by Benjamin Herrenschmidt
commit ad5b7f1350
2 changed files with 1 additions and 4 deletions
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1
arch/powerpc/Kconfig
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@ -134,6 +134,7 @@ config PPC
select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
select HAVE_GENERIC_HARDIRQS select HAVE_GENERIC_HARDIRQS
select HAVE_SPARSE_IRQ select HAVE_SPARSE_IRQ
select SPARSE_IRQ
select IRQ_PER_CPU select IRQ_PER_CPU
select GENERIC_IRQ_SHOW select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL select GENERIC_IRQ_SHOW_LEVEL

4
arch/powerpc/kernel/irq.c
View file

@ -93,10 +93,6 @@ extern int tau_interrupts(int);
#ifdef CONFIG_PPC64 #ifdef CONFIG_PPC64
#ifndef CONFIG_SPARSE_IRQ
EXPORT_SYMBOL(irq_desc);
#endif
int distribute_irqs = 1; int distribute_irqs = 1;
static inline notrace unsigned long get_hard_enabled(void) static inline notrace unsigned long get_hard_enabled(void)