From: "Jan Beulich" <JBeulich@suse.com>
To: <mingo@elte.hu>, <tglx@linutronix.de>, <hpa@zytor.com>
Cc: "Marcelo Tosatti" <mtosatti@redhat.com>, <linux-kernel@vger.kernel.org>
Subject: [PATCH] ix86: don't waste fixmap entries
Date: Wed, 29 May 2013 13:22:23 +0100 [thread overview]
Message-ID: <51A60F1F02000078000D997C@nat28.tlf.novell.com> (raw)
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@suse.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
---
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
next reply other threads:[~2013-05-29 12:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-29 12:22 Jan Beulich [this message]
2013-05-31 12:47 ` [tip:x86/mm] ix86: Don't " tip-bot for Jan Beulich
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