1. 06 Jun, 2011 5 commits
    • Ming Lei's avatar
      ARM: 6952/1: fix lockdep warning of "unannotated irqs-off" · 9fc2552a
      Ming Lei authored
      
      
      This patch fixes the lockdep warning of "unannotated irqs-off"[1].
      
      After entering __irq_usr, arm core will disable interrupt automatically,
      but __irq_usr does not annotate the irq disable, so lockdep may complain
      the warning if it has chance to check this in irq handler.
      
      This patch adds trace_hardirqs_off in __irq_usr before entering irq_handler
      to handle the irq, also calls ret_to_user_from_irq to avoid calling
      disable_irq again.
      
      This is also a fix for irq off tracer.
      
      [1], lockdep warning log of "unannotated irqs-off"
      
      [   13.804687] ------------[ cut here ]------------
      [   13.809570] WARNING: at kernel/lockdep.c:3335 check_flags+0x78/0x1d0()
      [   13.816467] Modules linked in:
      [   13.819732] Backtrace:
      [   13.822357] [<c01cb42c>] (dump_backtrace+0x0/0x100) from [<c06abb14>] (dump_stack+0x20/0x24)
      [   13.831268]  r6:c07d8c2c r5:00000d07 r4:00000000 r3:00000000
      [   13.837280] [<c06abaf4>] (dump_stack+0x0/0x24) from [<c01ffc04>] (warn_slowpath_common+0x5c/0x74)
      [   13.846649] [<c01ffba8>] (warn_slowpath_common+0x0/0x74) from [<c01ffc48>] (warn_slowpath_null+0x2c/0x34)
      [   13.856781]  r8:00000000 r7:00000000 r6:c18b8194 r5:60000093 r4:ef182000
      [   13.863708] r3:00000009
      [   13.866485] [<c01ffc1c>] (warn_slowpath_null+0x0/0x34) from [<c0237d84>] (check_flags+0x78/0x1d0)
      [   13.875823] [<c0237d0c>] (check_flags+0x0/0x1d0) from [<c023afc8>] (lock_acquire+0x4c/0x150)
      [   13.884704] [<c023af7c>] (lock_acquire+0x0/0x150) from [<c06af638>] (_raw_spin_lock+0x4c/0x84)
      [   13.893798] [<c06af5ec>] (_raw_spin_lock+0x0/0x84) from [<c01f9a44>] (sched_ttwu_pending+0x58/0x8c)
      [   13.903320]  r6:ef92d040 r5:00000003 r4:c18b8180
      [   13.908233] [<c01f99ec>] (sched_ttwu_pending+0x0/0x8c) from [<c01f9a90>] (scheduler_ipi+0x18/0x1c)
      [   13.917663]  r6:ef183fb0 r5:00000003 r4:00000000 r3:00000001
      [   13.923645] [<c01f9a78>] (scheduler_ipi+0x0/0x1c) from [<c01bc458>] (do_IPI+0x9c/0xfc)
      [   13.932006] [<c01bc3bc>] (do_IPI+0x0/0xfc) from [<c06b0888>] (__irq_usr+0x48/0xe0)
      [   13.939971] Exception stack(0xef183fb0 to 0xef183ff8)
      [   13.945281] 3fa0:                                     ffffffc3 0001500c 00000001 0001500c
      [   13.953948] 3fc0: 00000050 400b45f0 400d9000 00000000 00000001 400d9600 6474e552 bea05b3c
      [   13.962585] 3fe0: 400d96c0 bea059c0 400b6574 400b65d8 20000010 ffffffff
      [   13.969573]  r6:00000403 r5:fa240100 r4:ffffffff r3:20000010
      [   13.975585] ---[ end trace efc4896ab0fb62cb ]---
      [   13.980468] possible reason: unannotated irqs-off.
      [   13.985534] irq event stamp: 1610
      [   13.989044] hardirqs last  enabled at (1610): [<c01c703c>] no_work_pending+0x8/0x2c
      [   13.997131] hardirqs last disabled at (1609): [<c01c7024>] ret_slow_syscall+0xc/0x1c
      [   14.005371] softirqs last  enabled at (0): [<c01fe5e4>] copy_process+0x2cc/0xa24
      [   14.013183] softirqs last disabled at (0): [<  (null)>]   (null)
      Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      9fc2552a
    • Rabin Vincent's avatar
      ARM: 6951/1: include .bss in memory layout information · 45f6d7e0
      Rabin Vincent authored
      
      
      The "Virtual memory kernel layout" message at startup already prints
      .text and .data.  Print .bss too.
      Signed-off-by: default avatarRabin Vincent <rabin@rab.in>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      45f6d7e0
    • Ben Hutchings's avatar
      ARM: 6948/1: Fix .size directives for __arm{7,9}tdmi_proc_info · 9a819d8a
      Ben Hutchings authored
      
      
      gas used to accept (and ignore?) .size directives which referred to
      undefined symbols, as these do.  In binutils 2.21 these are treated
      as fatal errors.
      
      The issue in proc-arm7tdmi.S was also fixed independently by Peter
      Chubb.
      Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
      Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      9a819d8a
    • Linus Walleij's avatar
      ARM: 6947/2: mach-u300: fix compilation error in timer · 9425032b
      Linus Walleij authored
      
      
      The introduction of the mmio timer accidentally referenced the
      old clocksource struct which does not exist anymore. Fix this by
      using a simple string instead.
      Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      9425032b
    • Rob Herring's avatar
      ARM: 6946/1: vexpress: move v2m clock init to init_early · 2fdf9993
      Rob Herring authored
      Commit 7ff550de
      
       breaks vexpress booting. The
      v2m clock table needs to be setup in init_early before the timer
      initialization occurs.
      Signed-off-by: default avatarRob Herring <rob.herring@calxeda.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      2fdf9993
  2. 01 Jun, 2011 17 commits
  3. 31 May, 2011 9 commits
  4. 30 May, 2011 9 commits