The IRQ_PER_CPU Kconfig symbol was removed in the following commit:
Commit 
6a58fb3bad099076f36f0f30f44507bc3275cdb6 ("genirq: Remove
CONFIG_IRQ_PER_CPU") merged in v2.6.39-rc1.
But IRQ_PER_CPU wasn't removed from any of the architecture Kconfig
files where it was defined or selected. It's completely unused so remove
the remaining references.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: <uclinux-dist-devel@blackfin.uclinux.org>
Cc: <linux-mips@linux-mips.org>
Cc: <linuxppc-dev@lists.ozlabs.org>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Richard Kuo <rkuo@codeaurora.org>
Link: http://lkml.kernel.org/r/1359972583-17134-1-git-send-email-james.hogan@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
        select HAVE_GENERIC_HARDIRQS
        select GENERIC_ATOMIC64
        select GENERIC_IRQ_PROBE
-       select IRQ_PER_CPU if SMP
        select USE_GENERIC_SMP_HELPERS if SMP
        select HAVE_NMI_WATCHDOG if NMI_WATCHDOG
        select GENERIC_SMP_IDLE_THREAD
 
        # select ARCH_WANT_OPTIONAL_GPIOLIB
        # select ARCH_REQUIRE_GPIOLIB
        # select HAVE_CLK
-       # select IRQ_PER_CPU
        # select GENERIC_PENDING_IRQ if SMP
        select GENERIC_ATOMIC64
        select HAVE_PERF_EVENTS
 
        select ARCH_DISCARD_MEMBLOCK
        select GENERIC_IRQ_PROBE
        select GENERIC_PENDING_IRQ if SMP
-       select IRQ_PER_CPU
        select GENERIC_IRQ_SHOW
        select ARCH_WANT_OPTIONAL_GPIOLIB
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
 
 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
 
        select BROKEN_RODATA
        select GENERIC_IRQ_PROBE
        select GENERIC_PCI_IOMAP
-       select IRQ_PER_CPU
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_STRNCPY_FROM_USER
 
        select HAVE_GENERIC_HARDIRQS
        select ARCH_WANT_IPC_PARSE_VERSION
        select SPARSE_IRQ
-       select IRQ_PER_CPU
        select IRQ_DOMAIN
        select GENERIC_IRQ_SHOW
        select GENERIC_IRQ_SHOW_LEVEL
 
 config GENERIC_HWEIGHT
        def_bool y
 
-config IRQ_PER_CPU
-       def_bool y
-
 config GENERIC_GPIO
        def_bool n