smccc: fix sign bit expansion
Signed ARM_SMCCC_FAST_CALL value is shifted to 31'st bit. Then, it is expanded
to 64 bit value, which results in 1s in higher 32 bits.
This causes corrupted values in 64-bit SMC IDs and issues in buggy handlers of
32-bit calls.
We need to make ARM_SMCCC_FAST_CALL unsigned long, so it would work properly
on 32 bit architectures.
Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 2d1e6cc..7f2be23 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -11,8 +11,8 @@
* http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
*/
-#define ARM_SMCCC_STD_CALL 0
-#define ARM_SMCCC_FAST_CALL 1
+#define ARM_SMCCC_STD_CALL 0UL
+#define ARM_SMCCC_FAST_CALL 1UL
#define ARM_SMCCC_TYPE_SHIFT 31
#define ARM_SMCCC_SMC_32 0