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s390/alternatives: avoid using jgnop mnemonic 

jgnop mnemonic is only available since binutils 2.36,
kernel minimal required version is 2.23. Stick to brcl
to avoid build errors.

Reported-by: Nathan Chancellor <nathan@kernel.org>
Fixes: 4afeb67071 ("s390/alternatives: use instructions instead of byte patterns")
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2022-03-28 23:27:54 +02:00
parent 7dcfe50f58
commit faf79934e6
2 changed files with 2 additions and 2 deletions
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2
arch/s390/include/asm/alternative-asm.h
View File

@ -38,7 +38,7 @@
*/
.macro alt_pad_fill bytes
.rept ( \bytes ) / 6
jgnop .
brcl 0,0
.endr
.rept ( \bytes ) % 6 / 4
nop

2
arch/s390/include/asm/alternative.h
View File

@ -75,7 +75,7 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end);
"\tnopr\n" \
".else\n" \
"\t.rept " oldinstr_pad_len(num) " / 6\n" \
"\t.jgnop .\n" \
"\t.brcl 0,0\n" \
"\t.endr\n" \
"\t.rept " oldinstr_pad_len(num) " %% 6 / 4\n" \
"\tnop\n" \