[PATCH] i386: make x86_64 tsc header require i386 rather than vice-versa

Prior to commit 95492e4646e5de8b43d9a7908d6177fb737b61f0 ([PATCH] x86:
rewrite SMP TSC sync code), the headers in asm-i386 did not really require
anything in include/asm-x86_64.  This means that distributions such as
fedora did not include asm-x86_64 in kernel-devel headers for i386.  Ingo's
commit changed that, and broke things.  This is easy enough to hack around
in package builds by just including asm-x86_64 on i386, but that's kind of
annoying.  If anything, x86_64 should depend upon i386, not the other way
around.

This patch changes it so that asm-x86_64/tsc.h includes asm-i386/tsc.h,
rather than vice-versa.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 67 deletions

diff --git a/include/asm-x86_64/tsc.h b/include/asm-x86_64/tsc.h
index 26c3e982828..d66ba6ef25f 100644
--- a/include/asm-x86_64/tsc.h
+++ b/include/asm-x86_64/tsc.h
@@ -1,67 +1 @@
-/*
- * linux/include/asm-x86_64/tsc.h
- *
- * x86_64 TSC related functions
- */
-#ifndef _ASM_x86_64_TSC_H
-#define _ASM_x86_64_TSC_H
-
-#include <asm/processor.h>
-
-/*
- * Standard way to access the cycle counter.
- */
-typedef unsigned long long cycles_t;
-
-extern unsigned int cpu_khz;
-extern unsigned int tsc_khz;
-
-static inline cycles_t get_cycles(void)
-{
-	unsigned long long ret = 0;
-
-#ifndef CONFIG_X86_TSC
-	if (!cpu_has_tsc)
-		return 0;
-#endif
-
-#if defined(CONFIG_X86_GENERIC) || defined(CONFIG_X86_TSC)
-	rdtscll(ret);
-#endif
-	return ret;
-}
-
-/* Like get_cycles, but make sure the CPU is synchronized. */
-static __always_inline cycles_t get_cycles_sync(void)
-{
-	unsigned long long ret;
-#ifdef X86_FEATURE_SYNC_RDTSC
-	unsigned eax;
-
-	/*
-	 * Don't do an additional sync on CPUs where we know
-	 * RDTSC is already synchronous:
-	 */
-	alternative_io("cpuid", ASM_NOP2, X86_FEATURE_SYNC_RDTSC,
-			  "=a" (eax), "0" (1) : "ebx","ecx","edx","memory");
-#else
-	sync_core();
-#endif
-	rdtscll(ret);
-
-	return ret;
-}
-
-extern void tsc_init(void);
-extern void mark_tsc_unstable(void);
-extern int unsynchronized_tsc(void);
-extern void init_tsc_clocksource(void);
-
-/*
- * Boot-time check whether the TSCs are synchronized across
- * all CPUs/cores:
- */
-extern void check_tsc_sync_source(int cpu);
-extern void check_tsc_sync_target(void);
-
-#endif
+#include <asm-i386/tsc.h>