| commit | 4ca360f3dbf2036d964cdf3a6c4a45a81fdf8e18 | |
| author | Kautuk Consul <kautuk.consul.1980@gmail.com> | |
| Tue, 19 Apr 2016 10:18:21 +0000 (19 15:48 +0530) | ||
| committer | Michael Ellerman <mpe@ellerman.id.au> | |
| Fri, 6 Oct 2017 09:51:52 +0000 (6 20:51 +1100) | ||
| tree | 410ee4122e075d177af46e049efa823b6b9f02b9 | treesnapshot (tar.gz zip) |
| parent | 06755a871314c7443a89c09650cdb3982466e1a8 | commitdiff |
powerpc: get_wchan(): solve possible race scenario due to parallel wakeup
Add a check for p->state == TASK_RUNNING so that any wake-ups on
task_struct p in the interim lead to 0 being returned by get_wchan().
Signed-off-by: Kautuk Consul <kautuk.consul.1980@gmail.com>
[mpe: Confirmed other architectures do similar]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Add a check for p->state == TASK_RUNNING so that any wake-ups on
task_struct p in the interim lead to 0 being returned by get_wchan().
Signed-off-by: Kautuk Consul <kautuk.consul.1980@gmail.com>
[mpe: Confirmed other architectures do similar]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| arch/powerpc/kernel/process.c | diffblobblamehistory |