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x86: 32 bit: interrupt stub consistency with 64 bit

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Don't generate interrupt stubs for interrupt vectors below
FIRST_EXTERNAL_VECTOR, and make the table of interrupt vectors
(interrupt[]) __initconst.  Both of these changes both conserve memory
and improve consistency with 64 bits.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin
2008-11-11 13:03:07 -08:00
parent f21f237cf5
commit 4687518c4c
4 changed files with 7 additions and 6 deletions
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6
arch/x86/kernel/entry_32.S
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@@ -622,16 +622,16 @@ END(syscall_badsys)
* Build the entry stubs and pointer table with
* some assembler magic.
*/
.section .rodata,"a"
.section .init.rodata,"a"
ENTRY(interrupt)
.text
ENTRY(irq_entries_start)
RING0_INT_FRAME
vector=0
vector=FIRST_EXTERNAL_VECTOR
.rept NR_VECTORS
ALIGN
.if vector
.if vector != FIRST_EXTERNAL_VECTOR
CFI_ADJUST_CFA_OFFSET -4
.endif
1: pushl $~(vector)