Commit 6ec87566 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Ingo Molnar

x86: clean up arch/x86/ia32/syscall32.c

White space and coding style clenaup.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent c202f298
/* Copyright 2002,2003 Andi Kleen, SuSE Labs */ /*
* Copyright 2002,2003 Andi Kleen, SuSE Labs
/* vsyscall handling for 32bit processes. Map a stub page into it *
on demand because 32bit cannot reach the kernel's fixmaps */ * vsyscall handling for 32bit processes. Map a stub page into it on
* demand because 32bit cannot reach the kernel's fixmaps
*/
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/string.h> #include <linux/string.h>
#include <linux/kernel.h> #include <linux/kernel.h>
...@@ -50,31 +51,33 @@ int syscall32_setup_pages(struct linux_binprm *bprm, int exstack) ...@@ -50,31 +51,33 @@ int syscall32_setup_pages(struct linux_binprm *bprm, int exstack)
} }
static int __init init_syscall32(void) static int __init init_syscall32(void)
{ {
char *syscall32_page = (void *)get_zeroed_page(GFP_KERNEL); char *syscall32_page = (void *)get_zeroed_page(GFP_KERNEL);
if (!syscall32_page)
panic("Cannot allocate syscall32 page"); if (!syscall32_page)
panic("Cannot allocate syscall32 page");
syscall32_pages[0] = virt_to_page(syscall32_page); syscall32_pages[0] = virt_to_page(syscall32_page);
if (use_sysenter > 0) { if (use_sysenter > 0) {
memcpy(syscall32_page, syscall32_sysenter, memcpy(syscall32_page, syscall32_sysenter,
syscall32_sysenter_end - syscall32_sysenter); syscall32_sysenter_end - syscall32_sysenter);
} else { } else {
memcpy(syscall32_page, syscall32_syscall, memcpy(syscall32_page, syscall32_syscall,
syscall32_syscall_end - syscall32_syscall); syscall32_syscall_end - syscall32_syscall);
} }
return 0; return 0;
} }
__initcall(init_syscall32);
__initcall(init_syscall32);
/* May not be __init: called during resume */ /* May not be __init: called during resume */
void syscall32_cpu_init(void) void syscall32_cpu_init(void)
{ {
if (use_sysenter < 0) if (use_sysenter < 0)
use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL); use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL);
/* Load these always in case some future AMD CPU supports /*
SYSENTER from compat mode too. */ * Load these always in case some future AMD CPU supports
* SYSENTER from compat mode too.
*/
checking_wrmsrl(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS); checking_wrmsrl(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS);
checking_wrmsrl(MSR_IA32_SYSENTER_ESP, 0ULL); checking_wrmsrl(MSR_IA32_SYSENTER_ESP, 0ULL);
checking_wrmsrl(MSR_IA32_SYSENTER_EIP, (u64)ia32_sysenter_target); checking_wrmsrl(MSR_IA32_SYSENTER_EIP, (u64)ia32_sysenter_target);
......
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