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| author | eric miao <eric.y.miao@gmail.com> | 2010-06-25 10:46:09 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-09 15:41:33 +0200 |
| commit | 354e6f72d6fd5d3d2963efe030265972866cd969 (patch) | |
| tree | 2ec7973825a42f4d15d233375c5db3b073658421 /arch/arm/Kconfig | |
| parent | ARM: Prohibit ioremap() on kernel managed RAM (diff) | |
| download | linux-354e6f72d6fd5d3d2963efe030265972866cd969.tar.xz linux-354e6f72d6fd5d3d2963efe030265972866cd969.zip | |
ARM: 6197/2: preliminary support for sparse IRQ
So to allow NR_IRQS to be dynamic and platforms to specify the number
of IRQs really needed.
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 1f254bd6c937..9a0ed364d4f7 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1289,6 +1289,18 @@ config HW_PERF_EVENTS Enable hardware performance counter support for perf events. If disabled, perf events will use software events only. +config SPARSE_IRQ + bool "Support sparse irq numbering" + depends on EXPERIMENTAL + help + This enables support for sparse irqs. This is useful in general + as most CPUs have a fairly sparse array of IRQ vectors, which + the irq_desc then maps directly on to. Systems with a high + number of off-chip IRQs will want to treat this as + experimental until they have been independently verified. + + If you don't know what to do here, say N. + source "mm/Kconfig" config LEDS |