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c682e51dbc
linux/arch/arm
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Stephen Boyd c682e51dbc ARM: 7887/1: Don't smp_cross_call() on UP devices in arch_irq_work_raise() 
If we're running a kernel compiled with SMP_ON_UP=y and the
hardware only supports UP operation there isn't any
smp_cross_call function assigned. Unfortunately, we call
smp_cross_call() unconditionally in arch_irq_work_raise() and
crash the kernel on UP devices. Check to make sure we're running
on an SMP device before calling smp_cross_call() here.

Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 80000005 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.12.0-rc6-00018-g8d45144-dirty #16
task: de05b440 ti: de05c000 task.ti: de05c000
PC is at 0x0
LR is at arch_irq_work_raise+0x3c/0x48
pc : [<00000000>]    lr : [<c0019590>]    psr: 60000193
sp : de05dd60  ip : 00000001  fp : 00000000
r10: c085e2f0  r9 : de05c000  r8 : c07be0a4
r7 : de05c000  r6 : de05c000  r5 : c07c5778  r4 : c0824554
r3 : 00000000  r2 : 00000000  r1 : 00000006  r0 : c0529a58
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM Segment kernel
Control: 10c5387d  Table: 80004019  DAC: 00000017
Process swapper/0 (pid: 1, stack limit = 0xde05c248)
Stack: (0xde05dd60 to 0xde05e000)
dd60: c07b9dbc c00cb2dc 00000001 c08242c0 c08242c0 60000113 c07be0a8 c00b0590
dd80: de05c000 c085e2f0 c08242c0 c08242c0 c1414c28 c00b07cc de05b440 c1414c28
dda0: c08242c0 c00b0af8 c0862bb0 c0862db0 c1414cd8 de05c028 c0824840 de05ddb8
ddc0: 00000000 00000009 00000001 00000024 c07be0a8 c07be0a4 de05c000 c085e2f0
dde0: 00000000 c004a4b0 00000010 de00d2dc 00000054 00000100 00000024 00000000
de00: de05c028 0000000a ffff8ae7 00200040 00000016 de05c000 60000193 de05c000
de20: 00000054 00000000 00000000 00000000 00000000 c004a704 00000000 de05c008
de40: c07ba254 c004aa1c c07c5778 c0014b70 fa200000 00000054 de05de80 c0861244
de60: 00000000 c0008634 de05b440 c051c778 20000113 ffffffff de05deb4 c051d0a4
de80: 00000001 00000001 00000000 de05b440 c082afac de057ac0 de057ac0 de0443c0
dea0: 00000000 00000000 00000000 00000000 c082afbc de05dec8 c009f2a0 c051c778
dec0: 20000113 ffffffff 00000000 c016edb0 00000000 000002b0 de057ac0 de057ac0
dee0: 00000000 c016ee40 c0875e50 de05df2e de057ac0 00000000 00000013 00000000
df00: 00000000 c016f054 de043600 de0443c0 c008eb38 de004ec0 c0875e50 c008eb44
df20: 00000012 00000000 00000000 3931f0f8 00000000 00000000 00000014 c0822e84
df40: 00000000 c008ed2c 00000000 00000000 00000000 c07b7490 c07b7490 c075ab3c
df60: 00000000 c00701ac 00000002 00000000 c0070160 dffadb73 7bf8edb4 00000000
df80: c051092c 00000000 00000000 00000000 00000000 00000000 00000000 c0510934
dfa0: de05aa40 00000000 c051092c c0013ce8 00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 07efffe5 4dfac6f5
[<c0019590>] (arch_irq_work_raise+0x3c/0x48) from [<c00cb2dc>] (irq_work_queue+0xe4/0xf8)
[<c00cb2dc>] (irq_work_queue+0xe4/0xf8) from [<c00b0590>] (rcu_accelerate_cbs+0x1d4/0x1d8)
[<c00b0590>] (rcu_accelerate_cbs+0x1d4/0x1d8) from [<c00b07cc>] (rcu_start_gp+0x34/0x48)
[<c00b07cc>] (rcu_start_gp+0x34/0x48) from [<c00b0af8>] (rcu_process_callbacks+0x318/0x608)
[<c00b0af8>] (rcu_process_callbacks+0x318/0x608) from [<c004a4b0>] (__do_softirq+0x114/0x2a0)
[<c004a4b0>] (__do_softirq+0x114/0x2a0) from [<c004a704>] (do_softirq+0x6c/0x74)
[<c004a704>] (do_softirq+0x6c/0x74) from [<c004aa1c>] (irq_exit+0xac/0x100)
[<c004aa1c>] (irq_exit+0xac/0x100) from [<c0014b70>] (handle_IRQ+0x54/0xb4)
[<c0014b70>] (handle_IRQ+0x54/0xb4) from [<c0008634>] (omap3_intc_handle_irq+0x60/0x74)
[<c0008634>] (omap3_intc_handle_irq+0x60/0x74) from [<c051d0a4>] (__irq_svc+0x44/0x5c)
Exception stack(0xde05de80 to 0xde05dec8)
de80: 00000001 00000001 00000000 de05b440 c082afac de057ac0 de057ac0 de0443c0
dea0: 00000000 00000000 00000000 00000000 c082afbc de05dec8 c009f2a0 c051c778
dec0: 20000113 ffffffff
[<c051d0a4>] (__irq_svc+0x44/0x5c) from [<c051c778>] (_raw_spin_unlock_irq+0x28/0x2c)
[<c051c778>] (_raw_spin_unlock_irq+0x28/0x2c) from [<c016edb0>] (proc_alloc_inum+0x30/0xa8)
[<c016edb0>] (proc_alloc_inum+0x30/0xa8) from [<c016ee40>] (proc_register+0x18/0x130)
[<c016ee40>] (proc_register+0x18/0x130) from [<c016f054>] (proc_mkdir_data+0x44/0x6c)
[<c016f054>] (proc_mkdir_data+0x44/0x6c) from [<c008eb44>] (register_irq_proc+0x6c/0x128)
[<c008eb44>] (register_irq_proc+0x6c/0x128) from [<c008ed2c>] (init_irq_proc+0x74/0xb0)
[<c008ed2c>] (init_irq_proc+0x74/0xb0) from [<c075ab3c>] (kernel_init_freeable+0x84/0x1c8)
[<c075ab3c>] (kernel_init_freeable+0x84/0x1c8) from [<c0510934>] (kernel_init+0x8/0x150)
[<c0510934>] (kernel_init+0x8/0x150) from [<c0013ce8>] (ret_from_fork+0x14/0x2c)
Code: bad PC value

Fixes: bf18525fd7 "ARM: 7872/1: Support arch_irq_work_raise() via self IPIs"

Reported-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-11-09 00:00:07 +00:00
..
boot ARM: SoC fixes for 3.12-rc 2013-10-13 09:59:10 -07:00
common ARM: 7848/1: mcpm: Implement cpu_kill() to synchronise on powerdown 2013-10-29 11:07:15 +00:00
configs ARM: multi_v7_defconfig: add SDHCI for i.MX 2013-10-02 20:54:36 -07:00
crypto ARM: 7837/3: fix Thumb-2 bug in AES assembler code 2013-09-22 11:43:38 +01:00
include ARM: 7872/1: Support arch_irq_work_raise() via self IPIs 2013-11-07 00:21:26 +00:00
kernel ARM: 7887/1: Don't smp_cross_call() on UP devices in arch_irq_work_raise() 2013-11-09 00:00:07 +00:00
kvm ARM: 7862/1: pcpu: replace __get_cpu_var_uses 2013-10-29 11:06:27 +00:00
lib ARM: 7858/1: mm: make UACCESS_WITH_MEMCPY huge page aware 2013-10-29 11:06:15 +00:00
mach-at91 ARM: at91: sam9g45: shutdown ddr1 too when rebooting 2013-09-30 09:58:44 -07:00
mach-bcm ARM: bcm: Make secure API call optional 2013-08-20 10:51:39 -07:00
mach-bcm2835
mach-clps711x ARM: clps711x: edb7211: Remove extra iotable_init() call 2013-08-13 23:29:16 -07:00
mach-cns3xxx
mach-davinci ARM: davinci: dm365 evm: fix unused variable warning 2013-09-19 14:56:03 +05:30
mach-dove ARM: SoC board updates for 3.12 2013-09-06 13:34:43 -07:00
mach-ebsa110 ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-ep93xx ARM: SoC fixes for 3.12 2013-09-12 13:59:31 -07:00
mach-exynos ARM: SoC late changes for v3.12 2013-09-09 16:35:29 -07:00
mach-footbridge ARM: footbridge: fix build warnings for netwinder 2013-10-31 10:54:03 +00:00
mach-gemini ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-highbank ARM: SoC late changes for v3.12 2013-09-09 16:35:29 -07:00
mach-imx ACPI and power management fixes for 3.12-rc2 2013-09-20 15:17:14 -07:00
mach-integrator ARM: mach-integrator: Add stub for pci_v3_early_init() for !CONFIG_PCI 2013-09-25 21:59:52 -07:00
mach-iop13xx ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-iop32x ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-iop33x ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-ixp4xx ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-keystone Omap fixes for the merge window that are not urgent enough 2013-08-29 19:12:04 -07:00
mach-kirkwood ARM: SoC board updates for 3.12 2013-09-06 13:34:43 -07:00
mach-ks8695 gpio: (gpio-pca953x) move header to linux/platform_data/ 2013-08-29 12:33:52 -07:00
mach-lpc32xx ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-mmp ARM: SoC late changes for v3.12 2013-09-09 16:35:29 -07:00
mach-msm ARM: SoC cleanups for 3.12 2013-09-06 13:21:16 -07:00
mach-mv78xx0 ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
mach-mvebu ARM: mvebu: add missing of_node_put() to fix reference leak 2013-09-18 16:40:53 +00:00
mach-mxs ARM: mxs: pm: Include "pm.h" 2013-08-18 16:34:57 +08:00
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: DRA7: id: Add cpu detection support for DRA7xx based SoCs' 2013-08-13 16:58:08 +05:30
mach-omap2 ARM: OMAP2: RX-51: Add missing max_current to rx51_lp5523_led_config 2013-10-08 11:22:43 -07:00
mach-orion5x ARM: SoC board updates for 3.12 2013-09-06 13:34:43 -07:00
mach-picoxcell
mach-prima2 ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
mach-pxa ARM: SoC DT updates for 3.12 2013-09-06 13:26:27 -07:00
mach-realview ARM: SoC cleanups for 3.12 2013-09-06 13:21:16 -07:00
mach-rockchip
mach-rpc ARM: debug: move 8250 debug include into arch/arm/include/debug/ 2013-08-25 17:11:02 +01:00
mach-s3c24xx ARM: SAMSUNG: Remove pwm-clock infrastructure 2013-08-12 21:53:24 +02:00
mach-s3c64xx gpio: (gpio-pca953x) move header to linux/platform_data/ 2013-08-29 12:33:52 -07:00
mach-s5p64x0 ARM: SAMSUNG: Remove remaining uses of plat/regs-timer.h header 2013-08-12 21:53:24 +02:00
mach-s5pc100 ARM: SAMSUNG: Remove pwm-clock infrastructure 2013-08-12 21:53:24 +02:00
mach-s5pv210 ARM: SAMSUNG: Remove remaining uses of plat/regs-timer.h header 2013-08-12 21:53:24 +02:00
mach-sa1100 ARM: sa1100: collie.c: fall back to jedec_probe flash detection 2013-09-18 08:20:27 -07:00
mach-shark
mach-shmobile ARM: SoC fixes for 3.12-rc 2013-10-02 21:48:32 -07:00
mach-socfpga
mach-spear ARM: SoC cleanups for 3.12 2013-09-06 13:21:16 -07:00
mach-sti
mach-sunxi ARM: sunxi: Introduce Allwinner A20 support 2013-08-16 23:23:41 +02:00
mach-tegra ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
mach-u300 ARM: u300: hide submenus 2013-09-18 08:16:46 -07:00
mach-ux500 ARM: ux500: disable outer cache debug 2013-09-17 09:08:13 -07:00
mach-versatile Merge branch 'versatile/fixes' into fixes 2013-09-09 17:31:04 -07:00
mach-vexpress ARM: 7861/1: cacheflush: consolidate single-CPU ARMv7 cache disabling code 2013-10-29 11:06:23 +00:00
mach-virt
mach-vt8500
mach-w90x900
mach-zynq arm: Xilinx Zynq cleanup patches for v3.12 2013-08-20 15:05:31 -07:00
mm ARM: 7840/1: LPAE: don't reject mapping /dev/mem above 4GB 2013-10-29 11:06:03 +00:00
net
nwfpe
oprofile
plat-iop
plat-omap ARM: SoC platform changes for 3.12 2013-09-06 13:30:06 -07:00
plat-orion
plat-pxa ARM: pxa: ssp: Check return values from phandle lookups 2013-09-09 17:14:09 -07:00
plat-samsung ARM: SoC cleanups for 3.12 2013-09-06 13:21:16 -07:00
plat-versatile
tools
vfp
xen Linux 3.11-rc7 2013-09-09 12:05:37 -04:00
Kconfig ARM: 7869/1: remove unused XSCALE_PMU Kconfig param 2013-10-29 11:06:31 +00:00
Kconfig-nommu
Kconfig.debug ARM: 7860/1: debug: msm: Add DEBUG_LL support for ARCH_MSM8974 2013-10-29 11:06:21 +00:00
Makefile arm, kbuild: make "make install" not depend on vmlinux 2013-10-02 22:30:35 +02:00