[PATCH v6 09/17] arm64:ilp32 use the native LP64 'start_thread' for ILP32 threads
From: Yury Norov <hidden>
Date: 2015-11-02 23:33:42
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
From: Andrew Pinski <redacted> If we have both ILP32 and AARCH32 compiled in, we need use the non compat start thread for ILP32. Signed-off-by: Philipp Tomsich <redacted> Signed-off-by: Christoph Muellner <redacted> Signed-off-by: Yury Norov <redacted> Signed-off-by: Andrew Pinski <redacted> Reviewed-by: David Daney <redacted> --- arch/arm64/include/asm/processor.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index a415dd0..e244cb4 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h@@ -28,6 +28,7 @@ #ifdef __KERNEL__ #include <linux/string.h> +#include <linux/thread_info.h> #include <asm/fpsimd.h> #include <asm/hw_breakpoint.h>
@@ -123,6 +124,15 @@ static inline void start_thread(struct pt_regs *regs, unsigned long pc, static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp) { +#ifdef CONFIG_ARM64_ILP32 + /* ILP32 thread are started the same way as LP64 threads. + Note we cannot use is_ilp32_compat_task here as that + would introduce a header depency issue. */ + if (test_thread_flag(TIF_32BIT_AARCH64)) { + start_thread(regs, pc, sp); + return; + } +#endif start_thread_common(regs, pc); regs->pstate = COMPAT_PSR_MODE_USR; if (pc & 1)
--
2.1.4