diff options
| author | Andy Lutomirski <luto@kernel.org> | 2017-11-02 10:59:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-25 16:26:18 +0300 |
| commit | e37558449abadb91ac13b85737d963f230118bdf (patch) | |
| tree | 62f25a0ead2777046dbbfb9b6e80beb57abd4427 /arch/x86/xen | |
| parent | ebef3548d5777e842acb0ab1bba599643525536c (diff) | |
| download | linux-e37558449abadb91ac13b85737d963f230118bdf.tar.xz | |
x86/entry/64: Pass SP0 directly to load_sp0()
commit da51da189a24bb9b7e2d5a123be096e51a4695a5 upstream.
load_sp0() had an odd signature:
void load_sp0(struct tss_struct *tss, struct thread_struct *thread);
Simplify it to:
void load_sp0(unsigned long sp0);
Also simplify a few get_cpu()/put_cpu() sequences to
preempt_disable()/preempt_enable().
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/2655d8b42ed940aa384fe18ee1129bbbcf730a08.1509609304.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/xen')
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 60eb6dcacaac..e55d276afc70 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -811,15 +811,14 @@ static void __init xen_write_gdt_entry_boot(struct desc_struct *dt, int entry, } } -static void xen_load_sp0(struct tss_struct *tss, - struct thread_struct *thread) +static void xen_load_sp0(unsigned long sp0) { struct multicall_space mcs; mcs = xen_mc_entry(0); - MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->sp0); + MULTI_stack_switch(mcs.mc, __KERNEL_DS, sp0); xen_mc_issue(PARAVIRT_LAZY_CPU); - tss->x86_tss.sp0 = thread->sp0; + this_cpu_write(cpu_tss.x86_tss.sp0, sp0); } void xen_set_iopl_mask(unsigned mask) |