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| author | Mark Brown <broonie@kernel.org> | 2020-12-04 20:39:45 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-12-04 20:39:45 +0000 |
| commit | 4ecc08b2f51d874f35185724eda769492b60a18d (patch) | |
| tree | f4d9e97304e9ff423fd4efa5193a1b94ebfc5912 /arch/x86/kernel/alternative.c | |
| parent | 0b3355b070434f9901f641aac9000df93e2c96ad (diff) | |
| parent | 0d2bf11a6b3e275a526b8d42d8d4a3a6067cf953 (diff) | |
Merge tag 'auxbus-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core into asoc-5.11
Auxiliary Bus support tag for 5.11-rc1
This is a signed tag for other subsystems to be able to pull in the
auxiliary bus support into their trees for the 5.11-rc1 merge.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/alternative.c')
| -rw-r--r-- | arch/x86/kernel/alternative.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 4adbe65afe23..2400ad62f330 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -807,6 +807,15 @@ static inline temp_mm_state_t use_temporary_mm(struct mm_struct *mm) temp_mm_state_t temp_state; lockdep_assert_irqs_disabled(); + + /* + * Make sure not to be in TLB lazy mode, as otherwise we'll end up + * with a stale address space WITHOUT being in lazy mode after + * restoring the previous mm. + */ + if (this_cpu_read(cpu_tlbstate.is_lazy)) + leave_mm(smp_processor_id()); + temp_state.mm = this_cpu_read(cpu_tlbstate.loaded_mm); switch_mm_irqs_off(NULL, mm, current); |