2b2095f3a6
stop_machine_cpuslocked takes a mutex so it must be called in a preemptible context, so it can't simply be fixed by disabling preemption. This is not a bug, because CPU hotplug is locked, so this processor will call in to the stop machine function. So raw_smp_processor_id() could be used. This leaves a small chance that this thread will be migrated to another CPU, so the master work would be done by a CPU from a different context. Better for test coverage to make that a common case by just having the first CPU to call in become the master. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221013151647.1857994-2-npiggin@gmail.com |
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| .. | ||
| book3s32 | ||
| book3s64 | ||
| kasan | ||
| nohash | ||
| ptdump | ||
| Makefile | ||
| cacheflush.c | ||
| copro_fault.c | ||
| dma-noncoherent.c | ||
| drmem.c | ||
| fault.c | ||
| hugetlbpage.c | ||
| init-common.c | ||
| init_32.c | ||
| init_64.c | ||
| ioremap.c | ||
| ioremap_32.c | ||
| ioremap_64.c | ||
| maccess.c | ||
| mem.c | ||
| mmu_context.c | ||
| mmu_decl.h | ||
| numa.c | ||
| pageattr.c | ||
| pgtable-frag.c | ||
| pgtable.c | ||
| pgtable_32.c | ||
| pgtable_64.c | ||