arm64: Do not attempt to use init_mm in reset_context()

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After secondary CPU boot or hotplug, the active_mm of the idle thread is
&init_mm. The init_mm.pgd (swapper_pg_dir) is only meant for TTBR1_EL1
and must not be set in TTBR0_EL1. Since when active_mm == &init_mm the
TTBR0_EL1 is already set to the reserved value, there is no need to
perform any context reset.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>

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Catalin Marinas 2015-06-12 11:24:41 +01:00

parent 8a14849b4a

commit 565630d503

1 changed files with 8 additions and 0 deletions

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arch/arm64/mm/context.c

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