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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-05-02 19:27:16 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:16 +0200 |
| commit | c5413fbe894924ddb8aa474a4d4da52e7a6c7e0b (patch) | |
| tree | 8f317bf2494b6b4bceb5e6d1ee35fabc0eeb9971 /include/asm-i386 | |
| parent | 1956c73bb5bf81ee577ed7d3c64e3cad876ad2a5 (diff) | |
| download | op-kernel-dev-c5413fbe894924ddb8aa474a4d4da52e7a6c7e0b.zip op-kernel-dev-c5413fbe894924ddb8aa474a4d4da52e7a6c7e0b.tar.gz | |
[PATCH] i386: Fix UP gdt bugs
Fixes two problems with the GDT when compiling for uniprocessor:
- There's no percpu segment, so trying to load its selector into %fs fails.
Use a null selector instead.
- The real gdt needs to be loaded at some point. Do it in cpu_init().
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/processor.h | 1 | ||||
| -rw-r--r-- | include/asm-i386/segment.h | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h index ced2da8..70f3515 100644 --- a/include/asm-i386/processor.h +++ b/include/asm-i386/processor.h @@ -750,6 +750,7 @@ extern void enable_sep_cpu(void); extern int sysenter_setup(void); extern void cpu_set_gdt(int); +extern void switch_to_new_gdt(void); extern void cpu_init(void); extern int force_mwait; diff --git a/include/asm-i386/segment.h b/include/asm-i386/segment.h index 07e7062..597a47c 100644 --- a/include/asm-i386/segment.h +++ b/include/asm-i386/segment.h @@ -75,7 +75,11 @@ #define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8) #define GDT_ENTRY_PERCPU (GDT_ENTRY_KERNEL_BASE + 15) +#ifdef CONFIG_SMP #define __KERNEL_PERCPU (GDT_ENTRY_PERCPU * 8) +#else +#define __KERNEL_PERCPU 0 +#endif #define GDT_ENTRY_DOUBLEFAULT_TSS 31 |
