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authorDenys Vlasenko <dvlasenk@redhat.com>2015-04-24 17:31:33 +0200
committerIngo Molnar <mingo@kernel.org>2015-05-08 13:43:52 +0200
commit63332a8455d8310b77d38779c6c21a660a8d9feb (patch)
tree81919d8f8aac70e8ccc7ced0d8f042a472e6969a /arch/x86/ia32/ia32entry.S
parente22438f8e997ac1c8911d8808b6a4c492cd8bc6e (diff)
x86/entry: Stop using PER_CPU_VAR(kernel_stack)
PER_CPU_VAR(kernel_stack) is redundant: - On the 64-bit build, we can use PER_CPU_VAR(cpu_tss + TSS_sp0). - On the 32-bit build, we can use PER_CPU_VAR(cpu_current_top_of_stack). PER_CPU_VAR(kernel_stack) will be deleted by a separate change. Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Drewry <wad@chromium.org> Link: http://lkml.kernel.org/r/1429889495-27850-1-git-send-email-dvlasenk@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/ia32/ia32entry.S')
-rw-r--r--arch/x86/ia32/ia32entry.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 2ab0f7182df3..1b1330c07971 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -346,7 +346,7 @@ ENTRY(ia32_cstar_target)
SWAPGS_UNSAFE_STACK
movl %esp,%r8d
CFI_REGISTER rsp,r8
- movq PER_CPU_VAR(kernel_stack),%rsp
+ movq PER_CPU_VAR(cpu_tss + TSS_sp0),%rsp
ENABLE_INTERRUPTS(CLBR_NONE)
/* Zero-extending 32-bit regs, do not remove */