When CONFIG_MIPS_FP_SUPPORT=n we don't support floating point, so we
don't need to worry about floating point exceptions pending in the
Floating point Control & Status Register (FCSR) during switch_to(). Stub
out the __sanitize_fcr31() macro in this case.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxx>
---
arch/mips/include/asm/switch_to.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/mips/include/asm/switch_to.h b/arch/mips/include/asm/switch_to.h
index e610473d61b8..0f813bb753c6 100644
--- a/arch/mips/include/asm/switch_to.h
+++ b/arch/mips/include/asm/switch_to.h
@@ -84,7 +84,8 @@ do { \
* Check FCSR for any unmasked exceptions pending set with `ptrace',
* clear them and send a signal.
*/
-#define __sanitize_fcr31(next) \
+#ifdef CONFIG_MIPS_FP_SUPPORT
+# define __sanitize_fcr31(next) \
do { \
unsigned long fcr31 = mask_fcr31_x(next->thread.fpu.fcr31); \
void __user *pc; \
@@ -95,6 +96,9 @@ do { \
force_fcr31_sig(fcr31, pc, next); \
} \
} while (0)
+#else
+# define __sanitize_fcr31(next)
+#endif
/*
* For newly created kernel threads switch_to() will return to
--
2.19.1
