x86, vsyscall: Add missing <asm/fixmap.h> to arch/x86/mm/fault.c

arch/x86/mm/fault.c now depend on having the symbol VSYSCALL_START
defined, which is best handled by including <asm/fixmap.h> (it isn't
unreasonable we may want other fixed addresses in this file in the
future, and so it is cleaner than including <asm/vsyscall.h>
directly.)

This addresses an x86-64 allnoconfig build failure.  On other
configurations it was masked by an indirect path:

<asm/smp.h> -> <asm/apic.h> -> <asm/fixmap.h> -> <asm/vsyscall.h>

... however, the first such include is conditional on CONFIG_X86_LOCAL_APIC.

Originally-by: Randy Dunlap <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: http://lkml.kernel.org/r/CA%2B55aFxsOMc9=p02r8-QhJ=h=Mqwckk4_Pnx9LQt5%[email protected]
Signed-off-by: H. Peter Anvin <[email protected]>

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 247aae3dc008bdc78c58ff582fac3c61617b7f45..f2d4c9da97b4e54bb2bc79f454002ac7283819d5 100644 (file)
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -17,6 +17,7 @@
 #include <asm/traps.h>                 /* dotraplinkage, ...           */
 #include <asm/pgalloc.h>               /* pgd_*(), ...                 */
 #include <asm/kmemcheck.h>             /* kmemcheck_*(), ...           */
+#include <asm/fixmap.h>                        /* VSYSCALL_START               */
 
 /*
  * Page fault error code bits: