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authorPaul Mundt <lethal@linux-sh.org>2011-05-31 06:23:20 (GMT)
committerPaul Mundt <lethal@linux-sh.org>2011-05-31 06:23:20 (GMT)
commitd4905ce38c73964b868037e49a5945e1cf47a7f2 (patch)
treef7b41c1720dabb7b14a92ff0c47aeff1d6e4d70f /ipc/shm.c
parentdb7eba292e913390fa881272bfbc3da0a5380513 (diff)
downloadlinux-d4905ce38c73964b868037e49a5945e1cf47a7f2.tar.xz
Revert "clocksource: sh_tmu: Runtime PM support"
This reverts commit 1b842e91fea9447eff5eb687e28ad61c02f5033e. There is a fundamental ordering race between the early and late probe paths and the runtime PM tie-in that results in __pm_runtime_resume() attempting to take a lock that hasn't been initialized yet (which by proxy also suggests that pm_runtime_init() hasn't yet been run on the device either, making the entire thing unsafe) -- resulting in instant death on SMP or on UP with spinlock debugging enabled: sh_tmu.0: used for clock events sh_tmu.0: used for periodic clock events BUG: spinlock trylock failure on UP on CPU#0, swapper/0 lock: 804db198, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 ... Revert it for now until the ordering issues can be resolved, or we can get some more help from the runtime PM framework to make this possible. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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