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

Message ID 20220124174744.1054712-15-ardb@kernel.org (mailing list archive)
State New, archived
Headers show
Series ARM vmap'ed and IRQ stacks roundup | expand

Commit Message

Ard Biesheuvel Jan. 24, 2022, 5:47 p.m. UTC 
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@linaro.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
---
 arch/arm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

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"