X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=arch%2Farc%2Finclude%2Fasm%2Fbitops.h;h=0352fb8d21b998223b03e2bc327c3f4554df6ec5;hb=2a41b6dc28dc71c1a3f1622612a26edc58f7561e;hp=57c1f33844d44f1f9d16ed448ce0b13e87b88cea;hpb=8c4de9bc2041229fb778e0c47e32585b6f6b1d09;p=cascardo%2Flinux.git

diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h
index 57c1f33844d4..0352fb8d21b9 100644
--- a/arch/arc/include/asm/bitops.h
+++ b/arch/arc/include/asm/bitops.h
@@ -35,21 +35,6 @@ static inline void op##_bit(unsigned long nr, volatile unsigned long *m)\
 									\
 	m += nr >> 5;							\
 									\
-	/*								\
-	 * ARC ISA micro-optimization:					\
-	 *								\
-	 * Instructions dealing with bitpos only consider lower 5 bits	\
-	 * e.g (x << 33) is handled like (x << 1) by ASL instruction	\
-	 *  (mem pointer still needs adjustment to point to next word)	\
-	 *								\
-	 * Hence the masking to clamp @nr arg can be elided in general.	\
-	 *								\
-	 * However if @nr is a constant (above assumed in a register),	\
-	 * and greater than 31, gcc can optimize away (x << 33) to 0,	\
-	 * as overflow, given the 32-bit ISA. Thus masking needs to be	\
-	 * done for const @nr, but no code is generated due to gcc	\
-	 * const prop.							\
-	 */								\
 	nr &= 0x1f;							\
 									\
 	__asm__ __volatile__(						\