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authorAndy Lutomirski <luto@kernel.org>2017-11-02 10:59:14 +0300
committerIngo Molnar <mingo@kernel.org>2017-11-02 13:04:47 +0300
commit46f5a10a721ce8dce8cc8fe55279b49e1c6b3288 (patch)
tree4e6ca348b4ec0a7033f268399a1df3cb44b58c6b /arch/x86/kernel/process_64.c
parent20bb83443ea79087b5e5f8dab4e9d80bb9bf7acb (diff)
downloadlinux-46f5a10a721ce8dce8cc8fe55279b49e1c6b3288.tar.xz
x86/entry/64: Remove all remaining direct thread_struct::sp0 reads
The only remaining readers in context switch code or vm86(), and they all just want to update TSS.sp0 to match the current task. Replace them all with a new helper update_sp0(). 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/2d231687f4ff288c9d9e98d7861b7df374246ac3.1509609304.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
-rw-r--r--arch/x86/kernel/process_64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 2124304fb77a..45e380958392 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -465,7 +465,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
this_cpu_write(current_task, next_p);
/* Reload sp0. */
- load_sp0(next->sp0);
+ update_sp0(next_p);
/*
* Now maybe reload the debug registers and handle I/O bitmaps