linux/arch/powerpc/mm
Nicholas Piggin 2b2095f3a6 powerpc/64s: Fix hash__change_memory_range preemption warning
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
2022-10-18 22:46:18 +11:00
..
book3s32 - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
book3s64 powerpc/64s: Fix hash__change_memory_range preemption warning 2022-10-18 22:46:18 +11:00
kasan
nohash
ptdump
cacheflush.c
copro_fault.c
dma-noncoherent.c
drmem.c
fault.c
hugetlbpage.c
init_32.c
init_64.c
init-common.c
ioremap_32.c
ioremap_64.c
ioremap.c
maccess.c
Makefile
mem.c
mmu_context.c
mmu_decl.h
numa.c
pageattr.c
pgtable_32.c
pgtable_64.c
pgtable-frag.c
pgtable.c