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| author |   Ionela Voinescu <ionela.voinescu@arm.com> | 2020-11-13 15:53:28 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2020-11-13 20:14:58 +0000 |
| commit | 74490422522d125451cac400fce5d4e6bb9e1fea (patch) | |
| tree | b1915773f92d428989e2923a05c8348fc99c233c /Documentation/arm64 | |
| parent | arm64: implement CPPC FFH support using AMUs (diff) | |
| download | linux-dev-74490422522d125451cac400fce5d4e6bb9e1fea.tar.xz linux-dev-74490422522d125451cac400fce5d4e6bb9e1fea.zip | |
arm64: abort counter_read_on_cpu() when irqs_disabled()
Given that smp_call_function_single() can deadlock when interrupts are
disabled, abort the SMP call if irqs_disabled(). This scenario is
currently not possible given the function's uses, but safeguard this for
potential future uses.
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20201113155328.4194-1-ionela.voinescu@arm.com
[catalin.marinas@arm.com: modified following Mark's comment]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation/arm64')
0 files changed, 0 insertions, 0 deletions