5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiaxun Yang jiaxun.yang@flygoat.com
[ Upstream commit 5487a7b60695a92cf998350e4beac17144c91fcd ]
Some CPU feature macros were using current_cpu_type to mark feature availability.
However current_cpu_type will use smp_processor_id, which is prohibited under preemptable context.
Since those features are all uniform on all CPUs in a SMP system, use boot_cpu_type instead of current_cpu_type to fix preemptable kernel.
Cc: stable@vger.kernel.org Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com Signed-off-by: Thomas Bogendoerfer tsbogend@alpha.franken.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/include/asm/cpu-features.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h index b72887e033082..ae4a2f52e3c4d 100644 --- a/arch/mips/include/asm/cpu-features.h +++ b/arch/mips/include/asm/cpu-features.h @@ -128,7 +128,7 @@ ({ \ int __res; \ \ - switch (current_cpu_type()) { \ + switch (boot_cpu_type()) { \ case CPU_CAVIUM_OCTEON: \ case CPU_CAVIUM_OCTEON_PLUS: \ case CPU_CAVIUM_OCTEON2: \ @@ -358,7 +358,7 @@ ({ \ int __res; \ \ - switch (current_cpu_type()) { \ + switch (boot_cpu_type()) { \ case CPU_M14KC: \ case CPU_74K: \ case CPU_1074K: \