[RFC PATCH 4/9] riscv: Define is_compat_thread()

[Samuel Holland]

This allows checking if some thread other than current is 32-bit.

Signed-off-by: Samuel Holland <samuel.holland at sifive.com>
---

 arch/riscv/include/asm/compat.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/riscv/include/asm/compat.h b/arch/riscv/include/asm/compat.h
index 2ac955b51148..233c439c12d7 100644
--- a/arch/riscv/include/asm/compat.h
+++ b/arch/riscv/include/asm/compat.h
@@ -12,11 +12,18 @@
 #include <linux/sched/task_stack.h>
 #include <asm-generic/compat.h>
 
+#ifdef CONFIG_COMPAT
+
 static inline int is_compat_task(void)
 {
 	return test_thread_flag(TIF_32BIT);
 }
 
+static inline int is_compat_thread(struct thread_info *thread)
+{
+	return test_ti_thread_flag(thread, TIF_32BIT);
+}
+
 struct compat_user_regs_struct {
 	compat_ulong_t pc;
 	compat_ulong_t ra;
@@ -126,4 +133,13 @@ static inline void cregs_to_regs(struct compat_user_regs_struct *cregs,
 	regs->t6	= (unsigned long) cregs->t6;
 };
 
+#else
+
+static inline int is_compat_thread(struct thread_info *thread)
+{
+	return 0;
+}
+
+#endif
+
 #endif /* __ASM_COMPAT_H */
-- 
2.43.1