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| author | Andi Kleen <andi@firstfloor.org> | 2008-03-11 02:23:20 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:29 +0200 |
| commit | 5524ea320d80e3ac6aeeec44216660831c76da08 (patch) | |
| tree | c4215dbc41cedac15838ff5110958fa7ed8e9a67 | |
| parent | 366932deb335f0b84a08463c5c912bd42ac3397a (diff) | |
| download | blackbird-op-linux-5524ea320d80e3ac6aeeec44216660831c76da08.tar.gz blackbird-op-linux-5524ea320d80e3ac6aeeec44216660831c76da08.zip | |
x86: don't set up early exception handlers for external interrupts
All of early setup runs with interrupts disabled, so there is no
need to set up early exception handlers for vectors >= 32
This saves some minor text size.
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: mingo@elte.hu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/head64.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/head_64.S | 6 | ||||
| -rw-r--r-- | include/asm-x86/segment.h | 3 |
3 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index 48be76cda93b..d6d54faa84df 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -127,7 +127,7 @@ void __init x86_64_start_kernel(char * real_mode_data) /* Cleanup the over mapped high alias */ cleanup_highmap(); - for (i = 0; i < IDT_ENTRIES; i++) { + for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) { #ifdef CONFIG_EARLY_PRINTK set_intr_gate(i, &early_idt_handlers[i]); #else diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 017216916dff..2c0abe0e3c68 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -278,10 +278,8 @@ bad_address: .globl early_idt_handlers early_idt_handlers: - early_idt_tramp 0, 63 - early_idt_tramp 64, 127 - early_idt_tramp 128, 191 - early_idt_tramp 192, 255 + .set maxe, NUM_EXCEPTION_VECTORS-1 + early_idt_tramp 0, maxe #endif ENTRY(early_idt_handler) diff --git a/include/asm-x86/segment.h b/include/asm-x86/segment.h index 23f0535fec61..ed5131dd7d92 100644 --- a/include/asm-x86/segment.h +++ b/include/asm-x86/segment.h @@ -191,13 +191,14 @@ #define SEGMENT_TI_MASK 0x4 #define IDT_ENTRIES 256 +#define NUM_EXCEPTION_VECTORS 32 #define GDT_SIZE (GDT_ENTRIES * 8) #define GDT_ENTRY_TLS_ENTRIES 3 #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8) #ifdef __KERNEL__ #ifndef __ASSEMBLY__ -extern const char early_idt_handlers[IDT_ENTRIES][10]; +extern const char early_idt_handlers[NUM_EXCEPTION_VECTORS][10]; #endif #endif |
