[PATCH v5 14/32] ARM: use TLS register for 'current' on !SMP as well

Ard Biesheuvel ardb at kernel.org
Mon Jan 24 09:47:26 PST 2022


Enable the use of the TLS register to hold the 'current' pointer also on
non-SMP configurations that target v6k or later CPUs. This will permit
the use of THREAD_INFO_IN_TASK as well as IRQ stacks and vmap'ed stacks
for such configurations.

Acked-by: Linus Walleij <linus.walleij at linaro.org>
Acked-by: Nicolas Pitre <nico at fluxnic.net>
Acked-by: Arnd Bergmann <arnd at arndb.de>
Signed-off-by: Ard Biesheuvel <ardb at kernel.org>
Tested-by: Marc Zyngier <maz at kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin at arm.com> # ARMv7M
---
 arch/arm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9586636289d2..0e1b93de10b4 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1163,7 +1163,7 @@ config SMP_ON_UP
 
 config CURRENT_POINTER_IN_TPIDRURO
 	def_bool y
-	depends on SMP && CPU_32v6K && !CPU_V6
+	depends on CPU_32v6K && !CPU_V6
 
 config ARM_CPU_TOPOLOGY
 	bool "Support cpu topology definition"
-- 
2.30.2




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