diff options
author | Christian Borntraeger <borntraeger@de.ibm.com> | 2008-08-07 09:18:34 +0200 |
---|---|---|
committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-08-12 17:52:55 +1000 |
commit | b1b135c8d619cb2c7045d6ee4e48375882518bb5 (patch) | |
tree | 7c48ccd12e2d01e548351f34bde77fb13f5dc513 /drivers/oprofile/cpu_buffer.h | |
parent | ed6d68763b8b589c0ae9d231cbd72bd01f6685c5 (diff) | |
download | blackbird-op-linux-b1b135c8d619cb2c7045d6ee4e48375882518bb5.tar.gz blackbird-op-linux-b1b135c8d619cb2c7045d6ee4e48375882518bb5.zip |
fix spinlock recursion in hvc_console
commit 611e097d7707741a336a0677d9d69bec40f29f3d
Author: Christian Borntraeger <borntraeger@de.ibm.com>
hvc_console: rework setup to replace irq functions with callbacks
introduced a spinlock recursion problem.
request_irq tries to call the handler if the IRQ is shared.
The irq handler of hvc_console calls hvc_poll and hvc_kill
which might take the hvc_struct spinlock. Therefore, we have
to call request_irq outside the spinlock.
We can move the notifier_add safely outside the spinlock as ->data must
not be changed by the backend. Otherwise, tty_hangup would fail anyway.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/oprofile/cpu_buffer.h')
0 files changed, 0 insertions, 0 deletions