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| author | Andy Lutomirski <luto@kernel.org> | 2017-11-02 08:59:16 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-11-02 11:04:48 +0100 |
| commit | d375cf1530595e33961a8844192cddab913650e3 (patch) | |
| tree | 887429bbeeef5048ed511d07a5d8078101129bec /arch/x86/kernel/process_64.c | |
| parent | x86/entry/32: Fix cpu_current_top_of_stack initialization at boot (diff) | |
| download | linux-d375cf1530595e33961a8844192cddab913650e3.tar.xz linux-d375cf1530595e33961a8844192cddab913650e3.zip | |
x86/entry/64: Remove thread_struct::sp0
On x86_64, we can easily calculate sp0 when needed instead of
storing it in thread_struct.
On x86_32, a similar cleanup would be possible, but it would require
cleaning up the vm86 code first, and that can wait for a later
cleanup series.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
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/719cd9c66c548c4350d98a90f050aee8b17f8919.1509609304.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.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 45e380958392..eeeb34f85c25 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -274,7 +274,6 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long sp, struct inactive_task_frame *frame; struct task_struct *me = current; - p->thread.sp0 = (unsigned long)task_stack_page(p) + THREAD_SIZE; childregs = task_pt_regs(p); fork_frame = container_of(childregs, struct fork_frame, regs); frame = &fork_frame->frame; |