From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Date: Fri, 11 Jan 2019 09:49:30 +0100
Subject: x86/asm: Remove dead __GNUC__ conditionals
Git-commit: 88ca66d8540ca26119b1428cddb96b37925bdf01
Patch-mainline: v5.1-rc1
References: bsc#1112178

The minimum supported gcc version is >= 4.6, so these can be removed.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190111084931.24601-1-linux@rasmusvillemoes.dk
---
 arch/x86/include/asm/bitops.h    |    6 ------
 arch/x86/include/asm/string_32.h |   20 --------------------
 arch/x86/include/asm/string_64.h |   15 +--------------
 3 files changed, 1 insertion(+), 40 deletions(-)

--- a/arch/x86/include/asm/bitops.h
+++ b/arch/x86/include/asm/bitops.h
@@ -35,13 +35,7 @@
  * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
  */
 
-#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
-/* Technically wrong, but this avoids compilation errors on some gcc
-   versions. */
-#define BITOP_ADDR(x) "=m" (*(volatile long *) (x))
-#else
 #define BITOP_ADDR(x) "+m" (*(volatile long *) (x))
-#endif
 
 #define ADDR				BITOP_ADDR(addr)
 
--- a/arch/x86/include/asm/string_32.h
+++ b/arch/x86/include/asm/string_32.h
@@ -178,15 +178,8 @@ static inline void *__memcpy3d(void *to,
 
 #ifndef CONFIG_KMEMCHECK
 
-#if (__GNUC__ >= 4)
 #define memcpy(t, f, n) __builtin_memcpy(t, f, n)
 #else
-#define memcpy(t, f, n)				\
-	(__builtin_constant_p((n))		\
-	 ? __constant_memcpy((t), (f), (n))	\
-	 : __memcpy((t), (f), (n)))
-#endif
-#else
 /*
  * kmemcheck becomes very happy if we use the REP instructions unconditionally,
  * because it means that we know both memory operands in advance.
@@ -284,12 +277,7 @@ void *__constant_c_and_count_memset(void
 
 	{
 		int d0, d1;
-#if __GNUC__ == 4 && __GNUC_MINOR__ == 0
-		/* Workaround for broken gcc 4.0 */
-		register unsigned long eax asm("%eax") = pattern;
-#else
 		unsigned long eax = pattern;
-#endif
 
 		switch (count % 4) {
 		case 0:
@@ -321,15 +309,7 @@ void *__constant_c_and_count_memset(void
 	 : __memset_generic((s), (c), (count)))
 
 #define __HAVE_ARCH_MEMSET
-#if (__GNUC__ >= 4)
 #define memset(s, c, count) __builtin_memset(s, c, count)
-#else
-#define memset(s, c, count)						\
-	(__builtin_constant_p(c)					\
-	 ? __constant_c_x_memset((s), (0x01010101UL * (unsigned char)(c)), \
-				 (count))				\
-	 : __memset((s), (c), (count)))
-#endif
 
 /*
  * find the first occurrence of byte 'c', or 1 past the area if none
--- a/arch/x86/include/asm/string_64.h
+++ b/arch/x86/include/asm/string_64.h
@@ -31,20 +31,7 @@ static __always_inline void *__inline_me
 extern void *memcpy(void *to, const void *from, size_t len);
 extern void *__memcpy(void *to, const void *from, size_t len);
 
-#ifndef CONFIG_KMEMCHECK
-#if (__GNUC__ == 4 && __GNUC_MINOR__ < 3) || __GNUC__ < 4
-#define memcpy(dst, src, len)					\
-({								\
-	size_t __len = (len);					\
-	void *__ret;						\
-	if (__builtin_constant_p(len) && __len >= 64)		\
-		__ret = __memcpy((dst), (src), __len);		\
-	else							\
-		__ret = __builtin_memcpy((dst), (src), __len);	\
-	__ret;							\
-})
-#endif
-#else
+#ifdef CONFIG_KMEMCHECK
 /*
  * kmemcheck becomes very happy if we use the REP instructions unconditionally,
  * because it means that we know both memory operands in advance.