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| author | Stuart Menefy <stuart.menefy@st.com> | 2009-07-29 23:01:24 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-07-29 23:01:24 +0900 |
| commit | fd78a76aefb5bf28a11d6960d29e03a11db62320 (patch) | |
| tree | 8dac39f13c9b3bdadda02594f49501b5522ecad7 /arch/powerpc/kernel | |
| parent | 82b242214b6f5b96eb9b76452ac6e2b67dd81abd (diff) | |
| download | linux-stable-fd78a76aefb5bf28a11d6960d29e03a11db62320.tar.gz linux-stable-fd78a76aefb5bf28a11d6960d29e03a11db62320.tar.bz2 linux-stable-fd78a76aefb5bf28a11d6960d29e03a11db62320.zip | |
sh: Rework irqflags tracing to fix up CONFIG_PROVE_LOCKING.
This cleans up the irqflags tracing code quite a bit and ties it
in to various missing callsites that caused an imbalance when
CONFIG_PROVE_LOCKING was enabled.
Previously this was catching on:
987 #ifdef CONFIG_PROVE_LOCKING
988 DEBUG_LOCKS_WARN_ON(!p->hardirqs_enabled);
989 DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
990 #endif
991 retval = -EAGAIN;
with hardirqs being doubly enabled, and subsequently bailing out
with the following call trace:
Call trace:
[<88035224>] __lock_acquire+0x616/0x6a6
[<88015a8c>] do_fork+0xf8/0x2b0
[<880331ec>] trace_hardirqs_on_caller+0xd4/0x114
[<88241074>] _spin_unlock_irq+0x20/0x64
[<88035224>] __lock_acquire+0x616/0x6a6
[<8800386c>] kernel_thread+0x48/0x70
[<88024ecc>] ____call_usermodehelper+0x0/0x110
[<88024ecc>] ____call_usermodehelper+0x0/0x110
[<88003894>] kernel_thread_helper+0x0/0x14
[<88024bac>] __call_usermodehelper+0x38/0x70
[<88025dc0>] worker_thread+0x150/0x274
[<88035b9c>] lock_release+0x0/0x198
[<88024b74>] __call_usermodehelper+0x0/0x70
[<88028cf0>] autoremove_wake_function+0x0/0x30
[<88028bf2>] kthread+0x3e/0x70
[<88025c70>] worker_thread+0x0/0x274
[<8800389c>] kernel_thread_helper+0x8/0x14
[<88028bb4>] kthread+0x0/0x70
[<88003894>] kernel_thread_helper+0x0/0x14
Reported-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/powerpc/kernel')
0 files changed, 0 insertions, 0 deletions