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| author | Tejun Heo <tj@kernel.org> | 2009-01-13 20:41:35 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-16 14:19:26 +0100 |
| commit | f32ff5388d86518c0375ccdb330d3b459b9c405e (patch) | |
| tree | 8551cb03dcbbfafaac3500aac18fee811b0f1ffe /arch/x86/kernel/smpboot.c | |
| parent | 3e5d8f978435bb9ba4dfe3f4514e65e7885db1a9 (diff) | |
| download | blackbird-op-linux-f32ff5388d86518c0375ccdb330d3b459b9c405e.tar.gz blackbird-op-linux-f32ff5388d86518c0375ccdb330d3b459b9c405e.zip | |
x86: load pointer to pda into %gs while brining up a CPU
[ Based on original patch from Christoph Lameter and Mike Travis. ]
CPU startup code in head_64.S loaded address of a zero page into %gs
for temporary use till pda is loaded but address to the actual pda is
available at the point. Load the real address directly instead.
This will help unifying percpu and pda handling later on.
This patch is mostly taken from Mike Travis' "x86_64: Fold pda into
per cpu area" patch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 1a712da1dfa0..70d846628bbf 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -854,6 +854,7 @@ do_rest: #else cpu_pda(cpu)->pcurrent = c_idle.idle; clear_tsk_thread_flag(c_idle.idle, TIF_FORK); + initial_gs = (unsigned long)cpu_pda(cpu); #endif early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu); initial_code = (unsigned long)start_secondary; |
