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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-03-26 15:27:36 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-03-28 08:38:28 +0200 |
| commit | b058661a993aafc718ce713221bb1d57588c3710 (patch) | |
| tree | dd58b28124a34ef55993a4cae77a552d378dbd77 /arch/s390/kernel/entry.S | |
| parent | s390: add assembler macros for CPU alternatives (diff) | |
| download | linux-dev-b058661a993aafc718ce713221bb1d57588c3710.tar.xz linux-dev-b058661a993aafc718ce713221bb1d57588c3710.zip | |
s390/entry.S: use assembler alternatives
Replace the open coded alternatives for the BPOFF, BPON, BPENTER,
and BPEXIT macros with the new magic from asm/alternatives-asm.h
to make the code easier to read.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/entry.S')
| -rw-r--r-- | arch/s390/kernel/entry.S | 56 |
1 files changed, 7 insertions, 49 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 73492461c454..ee1b2f7b3d05 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -11,6 +11,7 @@ #include <linux/init.h> #include <linux/linkage.h> +#include <asm/alternative-asm.h> #include <asm/processor.h> #include <asm/cache.h> #include <asm/ctl_reg.h> @@ -162,65 +163,22 @@ _PIF_WORK = (_PIF_PER_TRAP | _PIF_SYSCALL_RESTART) .endm .macro BPOFF - .pushsection .altinstr_replacement, "ax" -660: .long 0xb2e8c000 - .popsection -661: .long 0x47000000 - .pushsection .altinstructions, "a" - .long 661b - . - .long 660b - . - .word 82 - .byte 4 - .byte 4 - .popsection + ALTERNATIVE "", ".long 0xb2e8c000", 82 .endm .macro BPON - .pushsection .altinstr_replacement, "ax" -662: .long 0xb2e8d000 - .popsection -663: .long 0x47000000 - .pushsection .altinstructions, "a" - .long 663b - . - .long 662b - . - .word 82 - .byte 4 - .byte 4 - .popsection + ALTERNATIVE "", ".long 0xb2e8d000", 82 .endm .macro BPENTER tif_ptr,tif_mask - .pushsection .altinstr_replacement, "ax" -662: .word 0xc004, 0x0000, 0x0000 # 6 byte nop - .word 0xc004, 0x0000, 0x0000 # 6 byte nop - .popsection -664: TSTMSK \tif_ptr,\tif_mask - jz . + 8 - .long 0xb2e8d000 - .pushsection .altinstructions, "a" - .long 664b - . - .long 662b - . - .word 82 - .byte 12 - .byte 12 - .popsection + ALTERNATIVE "TSTMSK \tif_ptr,\tif_mask; jz .+8; .long 0xb2e8d000", \ + "", 82 .endm .macro BPEXIT tif_ptr,tif_mask TSTMSK \tif_ptr,\tif_mask - .pushsection .altinstr_replacement, "ax" -662: jnz . + 8 - .long 0xb2e8d000 - .popsection -664: jz . + 8 - .long 0xb2e8c000 - .pushsection .altinstructions, "a" - .long 664b - . - .long 662b - . - .word 82 - .byte 8 - .byte 8 - .popsection + ALTERNATIVE "jz .+8; .long 0xb2e8c000", \ + "jnz .+8; .long 0xb2e8d000", 82 .endm #ifdef CONFIG_EXPOLINE |