[PATCH] uml: use GFP_ATOMIC for allocations under spinlocks.

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setup_initial_poll is only called with sigio_lock() held, so use appropriate
allocation.

Also, parse_chan() can also be called when holding a spinlock (see line_open()
 -> parse_chan_pair()).

I have sporadic problems (spinlock taken twice, with spinlock debugging on UP)
which could be caused by a sequence like "take spinlock, alloc and go to
sleep, take again the spinlock in the other thread".

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

...

This commit is contained in:

Paolo 'Blaisorblade' Giarrusso 2005-09-22 21:44:21 -07:00 • committed by Linus Torvalds

parent 46db4a42dd

commit 79ae2cb856

2 changed files with 2 additions and 2 deletions

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2

arch/um/drivers/chan_kern.c

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2

arch/um/kernel/sigio_user.c

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