From aac82d319148c6a84e1bf90b86d3e0ec8bf0ee38 Mon Sep 17 00:00:00 2001 From: Andy Lutomirski Date: Fri, 3 Apr 2015 15:51:54 -0700 Subject: x86, paravirt, xen: Remove the 64-bit ->irq_enable_sysexit() pvop We don't use irq_enable_sysexit on 64-bit kernels any more. Remove all the paravirt and Xen machinery to support it on 64-bit kernels. Tested-by: Boris Ostrovsky Signed-off-by: Andy Lutomirski Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/8a03355698fe5b94194e9e7360f19f91c1b2cf1f.1428100853.git.luto@kernel.org Signed-off-by: Ingo Molnar --- arch/x86/include/asm/paravirt_types.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 7549b8b369e4..38a0ff9ef06e 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -160,13 +160,14 @@ struct pv_cpu_ops { u64 (*read_pmc)(int counter); unsigned long long (*read_tscp)(unsigned int *aux); +#ifdef CONFIG_X86_32 /* * Atomically enable interrupts and return to userspace. This - * is only ever used to return to 32-bit processes; in a - * 64-bit kernel, it's used for 32-on-64 compat processes, but - * never native 64-bit processes. (Jump, not call.) + * is only used in 32-bit kernels. 64-bit kernels use + * usergs_sysret32 instead. */ void (*irq_enable_sysexit)(void); +#endif /* * Switch to usermode gs and return to 64-bit usermode using -- cgit v1.2.3