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| author | Nicholas Piggin <npiggin@gmail.com> | 2023-05-24 09:08:18 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-08-02 15:22:18 +0300 |
| commit | c3c2e93753484bb4e935ed8205c1f569907f5970 (patch) | |
| tree | 55a5f271fb496d435ae6b1c36766c125d9c5e7fb /arch/powerpc/kernel/setup-common.c | |
| parent | ab481817912ec5c882a6a42ce12c57aed3cfd506 (diff) | |
| download | linux-c3c2e93753484bb4e935ed8205c1f569907f5970.tar.xz | |
powerpc: Account mm_cpumask and active_cpus in init_mm
init_mm mm_cpumask and context.active_cpus is not maintained at boot
and hotplug. This seems to be harmless because init_mm does not have a
userspace and so never gets user TLBs flushed, but it looks odd and it
prevents some sanity checks being added.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230524060821.148015-2-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/setup-common.c')
| -rw-r--r-- | arch/powerpc/kernel/setup-common.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index d2a446216444..16843294d978 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -969,8 +969,12 @@ void __init setup_arch(char **cmdline_p) klp_init_thread_info(&init_task); setup_initial_init_mm(_stext, _etext, _edata, _end); - + /* sched_init() does the mmgrab(&init_mm) for the primary CPU */ + VM_WARN_ON(cpumask_test_cpu(smp_processor_id(), mm_cpumask(&init_mm))); + cpumask_set_cpu(smp_processor_id(), mm_cpumask(&init_mm)); + inc_mm_active_cpus(&init_mm); mm_iommu_init(&init_mm); + irqstack_early_init(); exc_lvl_early_init(); emergency_stack_init(); |