Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756630Ab1FGBTl (ORCPT ); Mon, 6 Jun 2011 21:19:41 -0400 Received: from d1.icnet.pl ([212.160.220.21]:32905 "EHLO d1.icnet.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754948Ab1FGBTj (ORCPT ); Mon, 6 Jun 2011 21:19:39 -0400 From: Janusz Krzysztofik Organization: Tele-Info-System, Poznan, PL To: "linux-omap@vger.kernel.org" Subject: [PATCH 3.0-rc2] OMAP: ams-delta: fix broken uevent sysfs entries Date: Tue, 7 Jun 2011 03:16:40 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.36-gentoo-r5; KDE/4.4.5; i686; ; ) Cc: Tony Lindgren , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <201106070316.41099.jkrzyszt@tis.icnet.pl> X-SA-Exim-Scanned: No (on d1.icnet); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6392 Lines: 113 Commit 6d3163ce86dd386b4f7bda80241d7fea2bc0bb1d, "mm: check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE", exhibited a bug on my Amstrad Delta resulting in reading /sys/device/platform/*/uevent for selected devices, namely "omap- keypad", "lcd_ams_delta", "ams-delta-led" and "soc-camera-pdrv", always ending up with segmentation faults: [ 77.499568] Unable to handle kernel paging request at virtual address 20676e69 [ 77.561984] pgd = c1004000 [ 77.583731] [20676e69] *pgd=00000000 [ 77.587515] Internal error: Oops: 15 [#1] PREEMPT [ 77.592324] Modules linked in: [ 77.595521] CPU: 0 Not tainted (3.0.0-rc2 #4) [ 77.600404] PC is at strlen+0x18/0x2c [ 77.604256] LR is at get_kobj_path_length+0x28/0x44 [ 77.609286] pc : [] lr : [] psr: 20000013 [ 77.609344] sp : c1bf7e10 ip : c1bf7e20 fp : c1bf7e1c [ 77.620976] r10: c1020000 r9 : 00000000 r8 : c0359ab0 [ 77.626323] r7 : c1945608 r6 : c1945608 r5 : 00000018 r4 : c00243b0 [ 77.632988] r3 : 20676e69 r2 : 20676e69 r1 : 000000d0 r0 : 20676e69 [ 77.639659] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 77.646942] Control: 0000317f Table: 11004000 DAC: 00000015 [ 77.652823] Process udevadm (pid: 551, stack limit = 0xc1bf6270) [ 77.658959] Stack: (0xc1bf7e10 to 0xc1bf8000) [ 77.663455] 7e00: c1bf7e34 c1bf7e20 c0154010 c01586bc [ 77.671835] 7e20: 000000d0 00000003 c1bf7e54 c1bf7e38 c01542f4 c0153ff8 c180f340 00000001 [ 77.680214] 7e40: 00000003 c180f340 c1bf7eb4 c1bf7e58 c0154c70 c01542e8 c1bf7ec4 c1bf7e68 [ 77.688591] 7e60: c00ad9f4 c00acbd4 00000000 c03ebbd0 c1bf7e84 c040065c c00aeb48 00000000 [ 77.696966] 7e80: 00000010 000280d0 c1bf7ec4 c1945600 00000003 c1be2780 c0359af8 00000003 [ 77.705352] 7ea0: c1bf6000 c1be2798 c1bf7ec4 c1bf7eb8 c0155040 c0154ab8 c1bf7ee4 c1bf7ec8 [ 77.713731] 7ec0: c019d6e4 c015503c c1bf6000 00000000 c1941360 c1945608 c1bf7ef4 c1bf7ee8 [ 77.722108] 7ee0: c019cc50 c019d6b8 c1bf7f1c c1bf7ef8 c00ee5c4 c019cc38 00000003 00000003 [ 77.730486] 7f00: 00000003 c1be2780 c1b31b00 c1bf7f78 c1bf7f44 c1bf7f20 c00ee970 c00ee580 [ 77.738863] 7f20: c1b31b00 00013474 00000003 c1bf7f78 c0028128 00000000 c1bf7f74 c1bf7f48 [ 77.747240] 7f40: c00a10b0 c00ee92c c1bf7f94 c1bf7f58 c009ef78 00000000 00000000 c1b31b00 [ 77.755618] 7f60: 00000004 c0028128 c1bf7fa4 c1bf7f78 c00a16bc c00a1004 00000000 00000000 [ 77.763994] 7f80: c0028128 00000000 c1bf7fa4 00000003 00013474 beb42150 00000000 c1bf7fa8 [ 77.772366] 7fa0: c0027f80 c00a1680 00000003 00013474 00000003 00013474 00000003 00000000 [ 77.780739] 7fc0: 00000003 00013474 beb42150 00000004 00009350 000099d1 0000000d 00000000 [ 77.789113] 7fe0: 0001f180 beb42140 0000be2d 400bcfa4 00000010 00000003 11ffe831 11ffec31 [ 77.797420] Backtrace: [ 77.800118] [] (strlen+0x0/0x2c) from [] (get_kobj_path_length+0x28/0x44) [ 77.808916] [] (get_kobj_path_length+0x0/0x44) from [] (kobject_get_path+0x1c/0x58) [ 77.818489] r5:00000003 r4:000000d0 [ 77.822292] [] (kobject_get_path+0x0/0x58) from [] (kobject_uevent_env+0x1c8/0x584) [ 77.831857] r6:c180f340 r5:00000003 r4:00000001 [ 77.836747] [] (kobject_uevent_env+0x0/0x584) from [] (kobject_uevent+0x14/0x18) [ 77.846172] [] (kobject_uevent+0x0/0x18) from [] (store_uevent+0x3c/0x5c) [ 77.854970] [] (store_uevent+0x0/0x5c) from [] (dev_attr_store+0x28/0x2c) [ 77.863659] r5:c1945608 r4:c1941360 [ 77.867533] [] (dev_attr_store+0x0/0x2c) from [] (flush_write_buffer+0x54/0x68) [ 77.876882] [] (flush_write_buffer+0x0/0x68) from [] (sysfs_write_file+0x54/0x7c) [ 77.886279] r8:c1bf7f78 r7:c1b31b00 r6:c1be2780 r5:00000003 r4:00000003 [ 77.893456] [] (sysfs_write_file+0x0/0x7c) from [] (vfs_write+0xbc/0x148) [ 77.902255] [] (vfs_write+0x0/0x148) from [] (sys_write+0x4c/0x7c) [ 77.910335] r8:c0028128 r7:00000004 r6:c1b31b00 r5:00000000 r4:00000000 [ 77.917453] [] (sys_write+0x0/0x7c) from [] (ret_fast_syscall+0x0/0x2c) [ 77.925972] r6:beb42150 r5:00013474 r4:00000003 [ 77.930842] Code: e24cb004 e1a02000 ea000000 e2800001 (e5d03000) [ 77.941934] ---[ end trace dd9983793dca7d8c ]--- Removing __initdata tags, introduced by commit bdc58fb950a3a1b0bc3cbd8e23d21ecdde2ac9a2, "arm: omap1: fix a bunch of section mismatches", from corresponding platform_device structures declared in arch/arm/mach-omap1/board-ams-delta.c, corrects the problem for me, which may indicate that their members (.name ?) are still referred to during runtime so they shouldn't be freed after boot. Signed-off-by: Janusz Krzysztofik --- arch/arm/mach-omap1/board-ams-delta.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- git/arch/arm/mach-omap1/board-ams-delta.c.orig 2011-06-06 18:06:57.000000000 +0200 +++ git/arch/arm/mach-omap1/board-ams-delta.c 2011-06-07 02:51:36.000000000 +0200 @@ -215,7 +215,7 @@ static struct omap_kp_platform_data ams_ .delay = 9, }; -static struct platform_device ams_delta_kp_device __initdata = { +static struct platform_device ams_delta_kp_device = { .name = "omap-keypad", .id = -1, .dev = { @@ -225,12 +225,12 @@ static struct platform_device ams_delta_ .resource = ams_delta_kp_resources, }; -static struct platform_device ams_delta_lcd_device __initdata = { +static struct platform_device ams_delta_lcd_device = { .name = "lcd_ams_delta", .id = -1, }; -static struct platform_device ams_delta_led_device __initdata = { +static struct platform_device ams_delta_led_device = { .name = "ams-delta-led", .id = -1 }; @@ -267,7 +267,7 @@ static struct soc_camera_link ams_delta_ .power = ams_delta_camera_power, }; -static struct platform_device ams_delta_camera_device __initdata = { +static struct platform_device ams_delta_camera_device = { .name = "soc-camera-pdrv", .id = 0, .dev = { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/