x86: 32 bit: interrupt stub consistency with 64 bit

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>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 28b597ef9ca1..4aea95652cff 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -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)