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authorIngo Molnar <mingo@elte.hu>2008-08-23 17:59:07 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-23 18:02:18 +0200
commit38c052f8cff1bd323ccfa968136a9556652ee420 (patch)
tree6cee3c0384438e13f065d196195a5d46a3941e4b /include/asm-generic/mutex-xchg.h
parent3c4fbe5e01d7e5309be5045e7ae0db20a049e6dc (diff)
rtc: fix deadlock
if get_rtc_time() is _ever_ called with IRQs off, we deadlock badly in it, waiting for jiffies to increment. So make the code more robust by doing an explicit mdelay(20). This solves a very hard to reproduce/debug hard lockup reported by Mikael Pettersson. Reported-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-generic/mutex-xchg.h')
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