Hi,
The latest linux-next (20140106 as well as 201401067) gives a boot
crash on Exynos5420 based boards with exynos_defconfig. The crash log
is as follows:
[ 4.550000] gpiochip_add: registered GPIOs 225 to 231 on device: gpz
[ 4.560000] Unable to handle kernel NULL pointer dereference at
virtual address 00000050
[ 4.565000] pgd = c0004000
[ 4.565000] [00000050] *pgd=00000000
[ 4.570000] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 4.570000] Modules linked in:
[ 4.570000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
3.13.0-rc7-next-20140107 #279
[ 4.570000] task: ef0a8000 ti: ef0a6000 task.ti: ef0a6000
[ 4.570000] PC is at __clk_get+0x24/0x80
[ 4.570000] LR is at of_clk_get.part.6+0x54/0x6c
[ 4.570000] pc : [<c02ddf34>] lr : [<c02db7c8>] psr: 60000113
[ 4.570000] sp : ef0a7d90 ip : ef0a7da0 fp : 00000001
[ 4.570000] r10: ef22d000 r9 : f001a000 r8 : 00001000
[ 4.570000] r7 : 00000000 r6 : c078c414 r5 : ffffffea r4 : 00000000
[ 4.570000] r3 : 00000050 r2 : 000001d9 r1 : c0569e80 r0 : 00000000
[ 4.570000] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM
Segment kernel
[ 4.570000] Control: 10c5387d Table: 2000406a DAC: 00000015
[ 4.570000] Process swapper/0 (pid: 1, stack limit = 0xef0a6240)
[ 4.570000] Stack: (0xef0a7d90 to 0xef0a8000)
[ 4.570000] 7d80: 00000000
c02db7c8 ef0a7da0 c02d738c
[ 4.570000] 7da0: c078afe4 00000001 000001d9 00000000 c04532a0
c02d7bb8 c04532a0 ffffffea
[ 4.570000] 7dc0: c078c414 00000000 c04532a0 c02db864 00000022
ef1f1040 c04532a0 ef22d128
[ 4.570000] 7de0: 00000000 c02db8c8 00000022 ef22d000 ef22d000
c01eb5b0 00000022 ef22d000
[ 4.570000] 7e00: 00000000 c01eba10 00000000 00000009 ef22d024
c078c414 00000000 ef22ca10
[ 4.570000] 7e20: 00000000 c02d93dc c0527ca8 c03aac00 c03aacc4
c02d7a0c 60000113 c0527ca8
[ 4.570000] 7e40: c078c078 c078c2b4 ef22ca10 00000000 00000000
00000000 00000001 c078c078
[ 4.570000] 7e60: c078c414 ef22ca10 00000000 c03aac00 00000000
c02d92c8 00000001 c0227f14
[ 4.570000] 7e80: 00000000 ef0a7ea8 60000113 c0527ca8 c03aac00
00000000 00000000 00000001
[ 4.570000] 7ea0: 00000000 c078c078 c078405c c03aac00 00000000
00000000 00000001 ef0a6038
[ 4.570000] 7ec0: 00000000 c02d955c 00000001 00000000 00000000
c04f037c 00000003 c052dc40
[ 4.570000] 7ee0: c052dc40 c04bd218 c04ddb70 c04bd238 00000000
c0008908 ef01c300 c043a894
[ 4.570000] 7f00: ef1d6900 c03855e8 60000100 c0501a80 60000113
c0501a80 00000000 00000000
[ 4.570000] 7f20: 00000000 c0501a7c c078eade c0395c4c 00000079
c0035d9c c049a768 00000003
[ 4.570000] 7f40: c078eaf0 00000003 00000000 c04f037c 00000003
c052dc40 c052dc40 c04ba50c
[ 4.570000] 7f60: c04ddb70 00000079 c04ddb58 c04bac9c 00000003
00000003 c04ba50c c0381638
[ 4.570000] 7f80: c15d65c0 0000dc40 c0378d54 00000000 00000000
00000000 00000000 00000000
[ 4.570000] 7fa0: 00000000 c0378d60 00000000 c000e438 00000000
00000000 00000000 00000000
[ 4.570000] 7fc0: 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
[ 4.570000] 7fe0: 00000000 00000000 00000000 00000000 00000013
00000000 00000000 00000000
[ 4.570000] [<c02ddf34>] (__clk_get) from [<c02db7c8>]
(of_clk_get.part.6+0x54/0x6c)
[ 4.570000] [<c02db7c8>] (of_clk_get.part.6) from [<c02db864>]
(of_clk_get_by_name+0x70/0xb0)
[ 4.570000] [<c02db864>] (of_clk_get_by_name) from [<c02db8c8>]
(clk_get+0x24/0x44)
[ 4.570000] [<c02db8c8>] (clk_get) from [<c01eb5b0>]
(amba_get_enable_pclk+0x14/0x68)
[ 4.570000] [<c01eb5b0>] (amba_get_enable_pclk) from [<c01eba10>]
(amba_device_add+0xa0/0x1d0)
[ 4.570000] [<c01eba10>] (amba_device_add) from [<c02d93dc>]
(of_platform_bus_create+0x248/0x2a0)
[ 4.570000] [<c02d93dc>] (of_platform_bus_create) from [<c02d92c8>]
(of_platform_bus_create+0x134/0x2a0)
[ 4.570000] [<c02d92c8>] (of_platform_bus_create) from [<c02d955c>]
(of_platform_populate+0x5c/0xa0)
[ 4.570000] [<c02d955c>] (of_platform_populate) from [<c04bd238>]
(customize_machine+0x20/0x40)
[ 4.570000] [<c04bd238>] (customize_machine) from [<c0008908>]
(do_one_initcall+0xf8/0x144)
[ 4.570000] [<c0008908>] (do_one_initcall) from [<c04bac9c>]
(kernel_init_freeable+0x13c/0x1dc)
[ 4.570000] [<c04bac9c>] (kernel_init_freeable) from [<c0378d60>]
(kernel_init+0xc/0x118)
[ 4.570000] [<c0378d60>] (kernel_init) from [<c000e438>]
(ret_from_fork+0x14/0x3c)
[ 4.570000] Code: e3500000 0a00000b e2843050 f57ff05b (e1932f9f)
[ 4.575000] ---[ end trace e07e345daa061b93 ]---
[ 4.580000] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x0000000b
[ 4.580000]
[ 4.580000] CPU3: stopping
[ 4.580000] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G D
3.13.0-rc7-next-20140107 #279
[ 4.580000] [<c0013e5c>] (unwind_backtrace) from [<c0011230>]
(show_stack+0x10/0x14)
[ 4.580000] [<c0011230>] (show_stack) from [<c037c600>]
(dump_stack+0x7c/0xbc)
[ 4.580000] [<c037c600>] (dump_stack) from [<c00131bc>]
(handle_IPI+0x148/0x158)
[ 4.580000] [<c00131bc>] (handle_IPI) from [<c00085c8>]
(gic_handle_irq+0x64/0x68)
[ 4.580000] [<c00085c8>] (gic_handle_irq) from [<c0011d80>]
(__irq_svc+0x40/0x70)
[ 4.580000] Exception stack(0xef0d9f98 to 0xef0d9fe0)
[ 4.580000] 9f80:
00000003 00000000
[ 4.580000] 9fa0: 00000001 00000000 ef0d8000 c04fc494 c0384b74
c052db19 00000001 c052db19
[ 4.580000] 9fc0: ef0d8000 ef0d8000 4c4b4000 ef0d9fe0 c000ef64
c000ef68 60000113 ffffffff
[ 4.580000] [<c0011d80>] (__irq_svc) from [<c000ef68>]
(arch_cpu_idle+0x2c/0x30)
[ 4.580000] [<c000ef68>] (arch_cpu_idle) from [<c00572e0>]
(cpu_startup_entry+0x108/0x150)
[ 4.580000] [<c00572e0>] (cpu_startup_entry) from [<20008664>] (0x20008664)
[ 4.580000] CPU1: stopping
[ 4.580000] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D
3.13.0-rc7-next-20140107 #279
[ 4.580000] [<c0013e5c>] (unwind_backtrace) from [<c0011230>]
(show_stack+0x10/0x14)
[ 4.580000] [<c0011230>] (show_stack) from [<c037c600>]
(dump_stack+0x7c/0xbc)
[ 4.580000] SMP: failed to stop secondary CPUs
[ 4.590000] [<c037c600>] (dump_stack) from [<c00131bc>]
(handle_IPI+0x148/0x158)
[ 4.600000] [<c00131bc>] (handle_IPI) from [<c00085c8>]
(gic_handle_irq+0x64/0x68)
[ 4.605000] [<c00085c8>] (gic_handle_irq) from [<c0011d80>]
(__irq_svc+0x40/0x70)
[ 4.615000] Exception stack(0xef0d5f98 to 0xef0d5fe0)
[ 4.620000] 5f80:
00000001 00000000
[ 4.630000] 5fa0: 00000001 00000000 ef0d4000 c04fc494 c0384b74
c052db19 00000001 c052db19
[ 4.635000] 5fc0: ef0d4000 ef0d4000 4c4b4000 ef0d5fe0 c000ef64
c000ef68 60000113 ffffffff
[ 4.645000] [<c0011d80>] (__irq_svc) from [<c000ef68>]
(arch_cpu_idle+0x2c/0x30)
[ 4.650000] [<c000ef68>] (arch_cpu_idle) from [<c00572e0>]
(cpu_startup_entry+0x108/0x150)
[ 4.660000] [<c00572e0>] (cpu_startup_entry) from [<20008664>] (0x20008664)
[ 4.670000] CPU2: stopping
[ 4.670000] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G D
3.13.0-rc7-next-20140107 #279
[ 4.680000] [<c0013e5c>] (unwind_backtrace) from [<c0011230>]
(show_stack+0x10/0x14)
[ 4.685000] [<c0011230>] (show_stack) from [<c037c600>]
(dump_stack+0x7c/0xbc)
[ 4.695000] [<c037c600>] (dump_stack) from [<c00131bc>]
(handle_IPI+0x148/0x158)
[ 4.700000] [<c00131bc>] (handle_IPI) from [<c00085c8>]
(gic_handle_irq+0x64/0x68)
[ 4.710000] [<c00085c8>] (gic_handle_irq) from [<c0011d80>]
(__irq_svc+0x40/0x70)
[ 4.715000] Exception stack(0xef0d7f98 to 0xef0d7fe0)
[ 4.720000] 7f80:
00000002 00000000
[ 4.730000] 7fa0: 00000001 00000000 ef0d6000 c04fc494 c0384b74
c052db19 00000001 c052db19
[ 4.740000] 7fc0: ef0d6000 ef0d6000 4c4b4000 ef0d7fe0 c000ef64
c000ef68 60000113 ffffffff
[ 4.745000] [<c0011d80>] (__irq_svc) from [<c000ef68>]
(arch_cpu_idle+0x2c/0x30)
[ 4.755000] [<c000ef68>] (arch_cpu_idle) from [<c00572e0>]
(cpu_startup_entry+0x108/0x150)
[ 4.760000] [<c00572e0>] (cpu_startup_entry) from [<20008664>] (0x20008664)
******************************
git bisect points to a merge commit 6ea578da5acf ("Merge
remote-tracking branch 'clk/clk-next'").
Couldn't make much out of it though. PC: c02ddf34 points to
arch/arm/include/asm/atomic.h:64 and
c02db7c8 points to drivers/clk/clkdev.c:47
There is however no such problem observed on Exynos4210 and 5250 based
boards. They boot fine.
--
With warm regards,
Sachin
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