ACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Tue, 28 Feb 2012 21:27:44 +0000 (13:27 -0800)
committerLen Brown <len.brown@intel.com>
Fri, 30 Mar 2012 07:58:06 +0000 (03:58 -0400)
commit9505626d7bfeb5bd4b85acb483831ac640b2a5e8
tree70e19eeda29ed3c98b628381eed2a3ce75ee398f
parente252675fb722d4a307cc380a06a905f03cf9951c
ACPI: Fix unprotected smp_processor_id() in acpi_processor_cst_has_changed()

The acpi_processor_cst_has_changed() function is invoked from a
CPU_ONLINE or CPU_DEAD function, which might well execute on CPU 0
even though the CPU being hotplugged is some other CPU.  In addition,
acpi_processor_cst_has_changed() invokes smp_processor_id() without
protection, resulting in splats when onlining CPUs.

This commit therefore changes the smp_processor_id() to pr->id, as is
used elsewhere in the code, for example, in acpi_processor_add().

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Tested-by: Yong Zhang <yong.zhang0@gmail.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/acpi/processor_idle.c