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Message-ID: <CAK9yfHwwmZkFMRvxsxjBAfUbVXU3V+iPFDZO=DwQsFvJ3NQyKA@mail.gmail.com> Date: Thu, 20 Feb 2014 14:09:08 +0530 From: Sachin Kamat <sachin.kamat@...aro.org> To: Grant Likely <grant.likely@...aro.org> Cc: "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, Kevin Hao <haokexin@...il.com>, Rob Herring <robh+dt@...nel.org>, Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>, linux-samsung-soc <linux-samsung-soc@...r.kernel.org> Subject: Re: [PATCH v4 0/4] Bugfix for of_match_node ordering Hi Grant, I observe the following boot failure with today's (next-20140220) linux-next tree on Exynos based boards with the default exynos_defconfig. Uncompressing Linux... done, booting the kernel. [ 0.000000] Booting Linux on physical CPU 0x900 [ 0.000000] Linux version 3.14.0-rc3-next-20140220 (sachin@...aro) (gcc version 4.8.2 20130805 (prerelease) (crosstool-NG linaro-1. 13.1-4.8-2013.08 - Linaro GCC 2013.08) ) #1132 SMP PREEMPT Thu Feb 20 13:49:27 IST 2014 [ 0.000000] CPU: ARMv7 Processor [412fc091] revision 1 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] Machine model: Insignal Origen evaluation board based on Exynos4210 [ 0.000000] bootconsole [earlycon0] enabled [ 0.000000] Memory policy: Data cache writealloc [ 0.000000] CPU EXYNOS4210 (id 0x43210011) [ 0.000000] On node 0 totalpages: 258048 [ 0.000000] Normal zone: 1520 pages used for memmap [ 0.000000] Normal zone: 0 pages reserved [ 0.000000] Normal zone: 190464 pages, LIFO batch:31 [ 0.000000] HighMem zone: 528 pages used for memmap [ 0.000000] HighMem zone: 67584 pages, LIFO batch:15 [ 0.000000] BUG: spinlock recursion on CPU#0, swapper/0 [ 0.000000] lock: devtree_lock+0x0/0x10, .magic: dead4ead, .owner: swapper/0, .owner_cpu: 0 [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.0-rc3-next-20140220 #1132 [ 0.000000] [<c0013e9c>] (unwind_backtrace) from [<c0011250>] (show_stack+0x10/0x14) [ 0.000000] [<c0011250>] (show_stack) from [<c0386740>] (dump_stack+0x7c/0xbc) [ 0.000000] [<c0386740>] (dump_stack) from [<c005501c>] (do_raw_spin_lock+0x188/0x18c) [ 0.000000] [<c005501c>] (do_raw_spin_lock) from [<c038b614>] (_raw_spin_lock_irqsave+0x20/0x28) [ 0.000000] [<c038b614>] (_raw_spin_lock_irqsave) from [<c02de37c>] (of_find_property+0x20/0x4c) [ 0.000000] [<c02de37c>] (of_find_property) from [<c02df110>] (__of_device_is_compatible+0xb4/0x110) [ 0.000000] [<c02df110>] (__of_device_is_compatible) from [<c02df22c>] (of_find_compatible_node+0x4c/0x7c) [ 0.000000] [<c02df22c>] (of_find_compatible_node) from [<c04cedf4>] (exynos_firmware_init+0x18/0x7c) [ 0.000000] [<c04cedf4>] (exynos_firmware_init) from [<c04caef0>] (setup_arch+0x860/0x898) [ 0.000000] [<c04caef0>] (setup_arch) from [<c04c7820>] (start_kernel+0x80/0x3dc) [ 0.000000] [<c04c7820>] (start_kernel) from [<40008074>] (0x40008074) [ 0.000000] BUG: spinlock lockup suspected on CPU#0, swapper/0 [ 0.000000] lock: devtree_lock+0x0/0x10, .magic: dead4ead, .owner: swapper/0, .owner_cpu: 0 [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.0-rc3-next-20140220 #1132 [ 0.000000] [<c0013e9c>] (unwind_backtrace) from [<c0011250>] (show_stack+0x10/0x14) [ 0.000000] [<c0011250>] (show_stack) from [<c0386740>] (dump_stack+0x7c/0xbc) [ 0.000000] [<c0386740>] (dump_stack) from [<c0054fac>] (do_raw_spin_lock+0x118/0x18c) [ 0.000000] [<c0054fac>] (do_raw_spin_lock) from [<c038b614>] (_raw_spin_lock_irqsave+0x20/0x28) [ 0.000000] [<c038b614>] (_raw_spin_lock_irqsave) from [<c02de37c>] (of_find_property+0x20/0x4c) [ 0.000000] [<c02de37c>] (of_find_property) from [<c02df110>] (__of_device_is_compatible+0xb4/0x110) [ 0.000000] [<c02df110>] (__of_device_is_compatible) from [<c02df22c>] (of_find_compatible_node+0x4c/0x7c) [ 0.000000] [<c02df22c>] (of_find_compatible_node) from [<c04cedf4>] (exynos_firmware_init+0x18/0x7c) [ 0.000000] [<c04cedf4>] (exynos_firmware_init) from [<c04caef0>] (setup_arch+0x860/0x898) [ 0.000000] [<c04caef0>] (setup_arch) from [<c04c7820>] (start_kernel+0x80/0x3dc) [ 0.000000] [<c04c7820>] (start_kernel) from [<40008074>] (0x40008074) Regards, Sachin On 19 February 2014 19:44, Grant Likely <grant.likely@...aro.org> wrote: > Hi all, > > I've taken Kevin's latest rework and done even more rework on it. :-) I > didn't quite like how it was looking so I rolled his scoring code > directly into __of_device_is_compatible() so that the function always > returns a score in a way that is still compatible with the existing > users (ie. non-zero == successful match). This eliminates the need for a > separate pscore argument and it also let me roll the type and name > checks into the same function. I'm a lot happier with it overall and it > makes for a slightly smaller number of lines of code changed. Please > take a look and give it a spin. This is basically a bug fix so I'll need > to push it out to Linus in the near future. > > Acks and Tested-bys would be particularly appreciated. > > Thanks, > g. > > Kevin Hao (2): > Revert "of: search the best compatible match first in __of_match_node()" > of: reimplement the matching method for __of_match_node() > > Grant Likely (2): > of: Move testcase FDT data into drivers/of > of: Add self test for of_match_node() > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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