[PATCH] ix86: don't waste fixmap entries

From: Jan Beulich
Date: Wed May 29 2013 - 08:22:32 EST


The vsyscall related pvclock entries can only ever be used on x86-64,
and hence they shouldn't even get allocated for 32-bit kernels (the
more that it is there where address space is relatively precious).

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>

---
arch/x86/include/asm/fixmap.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- 3.10-rc3/arch/x86/include/asm/fixmap.h
+++ 3.10-rc3-ix86-fixmap-no-pvclock/arch/x86/include/asm/fixmap.h
@@ -81,11 +81,11 @@ enum fixed_addresses {
+ ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1,
VVAR_PAGE,
VSYSCALL_HPET,
-#endif
#ifdef CONFIG_PARAVIRT_CLOCK
PVCLOCK_FIXMAP_BEGIN,
PVCLOCK_FIXMAP_END = PVCLOCK_FIXMAP_BEGIN+PVCLOCK_VSYSCALL_NR_PAGES-1,
#endif
+#endif
FIX_DBGP_BASE,
FIX_EARLYCON_MEM_BASE,
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT



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