• Denys Vlasenko's avatar
    x86/entry: Define 'cpu_current_top_of_stack' for 64-bit code · 3a23208e
    Denys Vlasenko authored
    32-bit code has PER_CPU_VAR(cpu_current_top_of_stack).
    64-bit code uses somewhat more obscure: PER_CPU_VAR(cpu_tss + TSS_sp0).
    
    Define the 'cpu_current_top_of_stack' macro on CONFIG_X86_64
    as well so that the PER_CPU_VAR(cpu_current_top_of_stack)
    expression can be used in both 32-bit and 64-bit code.
    Signed-off-by: default avatarDenys 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/1429889495-27850-3-git-send-email-dvlasenk@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    3a23208e
ia32entry.S 16.2 KB