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authorLinus Torvalds <torvalds@linux-foundation.org>2008-04-15 13:09:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-15 13:09:54 -0700
commit093a07e2fdfaddab7fc7d4adc76cc569c86603d7 (patch)
treebaaa4d86680347a0687ebfbe133d7b253b88102c /arch/parisc/kernel/signal.c
parent0de19a456cb59106420864927fdec152310f70b6 (diff)
Fix locking bug in "acquire_console_semaphore_for_printk()"
When I cleaned up printk() and split up the printk locking logic in commit 266c2e0abeca649fa6667a1a427ad1da507c6375 ("Make printk() console semaphore accesses sensible") I had incorrectly moved the call to have_callable_console() outside of the console semaphore. That was buggy. The console semaphore protects the console_drivers list that is used by have_callable_console(). Thanks go to Bongani Hlope who saw this as a hang on shutdown and reboot and bisected the bug to the right commit, and tested this patch. See http://lkml.org/lkml/2008/4/11/315 Bisected-and-tested-by: Bongani Hlope <bonganilinux@mweb.co.za> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/parisc/kernel/signal.c')
0 files changed, 0 insertions, 0 deletions