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Message-Id: <20141206174148.808498059@1wt.eu> Date: Sat, 06 Dec 2014 18:41:57 +0100 From: Willy Tarreau <w@....eu> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>, Richard Weinberger <richard@....at>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Ben Hutchings <ben@...adent.org.uk>, Willy Tarreau <w@....eu> Subject: [ 09/25] x86, espfix: Make espfix64 a Kconfig option, fix UML 2.6.32-longterm review patch. If anyone has any objections, please let me know. ------------------ From: "H. Peter Anvin" <hpa@...or.com> commit 197725de65477bc8509b41388157c1a2283542bb upstream. Make espfix64 a hidden Kconfig option. This fixes the x86-64 UML build which had broken due to the non-existence of init_espfix_bsp() in UML: since UML uses its own Kconfig, this option does not appear in the UML build. This also makes it possible to make support for 16-bit segments a configuration option, for the people who want to minimize the size of the kernel. Reported-by: Ingo Molnar <mingo@...nel.org> Signed-off-by: H. Peter Anvin <hpa@...or.com> Cc: Richard Weinberger <richard@....at> Link: http://lkml.kernel.org/r/1398816946-3351-1-git-send-email-hpa@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> (cherry picked from 3.2 commit da22646d97b7322c757f3a7a21805a3475fed231) Signed-off-by: Willy Tarreau <w@....eu> --- arch/x86/Kconfig | 4 ++++ arch/x86/kernel/Makefile | 2 +- arch/x86/kernel/smpboot.c | 2 +- init/main.c | 2 +- 4 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index ee0168d..026fe60 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -887,6 +887,10 @@ config VM86 XFree86 to initialize some video cards via BIOS. Disabling this option saves about 6k. +config X86_ESPFIX64 + def_bool y + depends on X86_64 + config TOSHIBA tristate "Toshiba Laptop support" depends on X86_32 diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index f58fd89..945ad6f 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -40,7 +40,7 @@ obj-$(CONFIG_X86_32) += probe_roms_32.o obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o -obj-$(CONFIG_X86_64) += espfix_64.o +obj-$(CONFIG_X86_ESPFIX64) += espfix_64.o obj-y += bootflag.o e820.o obj-y += pci-dma.o quirks.o i8237.o topology.o kdebugfs.o obj-y += alternative.o i8253.o pci-nommu.o diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 0854448..ca6b3f9 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -328,7 +328,7 @@ notrace static void __cpuinit start_secondary(void *unused) /* * Enable the espfix hack for this CPU */ -#ifdef CONFIG_X86_64 +#ifdef CONFIG_X86_ESPFIX64 init_espfix_ap(); #endif diff --git a/init/main.c b/init/main.c index 0dfcc1a..00e6286 100644 --- a/init/main.c +++ b/init/main.c @@ -659,7 +659,7 @@ asmlinkage void __init start_kernel(void) if (efi_enabled) efi_enter_virtual_mode(); #endif -#ifdef CONFIG_X86_64 +#ifdef CONFIG_X86_ESPFIX64 /* Should be run before the first non-init thread is created */ init_espfix_bsp(); #endif -- 1.7.12.2.21.g234cd45.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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