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| author | Andrew Jones <ajones@ventanamicro.com> | 2023-02-24 19:26:24 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-03-15 07:26:01 +0300 |
| commit | 0b2f658f5370d9818244682c76fd8f6a91b2b1af (patch) | |
| tree | 97ff37c4c87a75daf3161eef26973fb8a9676f4e | |
| parent | 816a69744102bc886edc3557d00e840e3e35e7d5 (diff) | |
| download | linux-0b2f658f5370d9818244682c76fd8f6a91b2b1af.tar.xz | |
RISC-V: alternatives: Support patching multiple insns in assembly
As pointed out in commit d374a16539b1 ("RISC-V: fix compile error
from deduplicated __ALTERNATIVE_CFG_2"), we need quotes around
parameters passed to macros within macros to avoid spaces being
interpreted as separators. ALT_NEW_CONTENT was trying to handle
this by defining new_c has a vararg, but this isn't sufficient
for calling ALTERNATIVE() from assembly with multiple instructions
in the new/old sequences. Remove the vararg "hack" and use quotes.
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230224162631.405473-2-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | arch/riscv/include/asm/alternative-macros.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/riscv/include/asm/alternative-macros.h b/arch/riscv/include/asm/alternative-macros.h index 993a44a8fdac..b8c55fb3ab2c 100644 --- a/arch/riscv/include/asm/alternative-macros.h +++ b/arch/riscv/include/asm/alternative-macros.h @@ -14,7 +14,7 @@ .4byte \patch_id .endm -.macro ALT_NEW_CONTENT vendor_id, patch_id, enable = 1, new_c : vararg +.macro ALT_NEW_CONTENT vendor_id, patch_id, enable = 1, new_c .if \enable .pushsection .alternative, "a" ALT_ENTRY 886b, 888f, \vendor_id, \patch_id, 889f - 888f @@ -41,13 +41,13 @@ \old_c .option pop 887 : - ALT_NEW_CONTENT \vendor_id, \patch_id, \enable, \new_c + ALT_NEW_CONTENT \vendor_id, \patch_id, \enable, "\new_c" .endm .macro ALTERNATIVE_CFG_2 old_c, new_c_1, vendor_id_1, patch_id_1, enable_1, \ new_c_2, vendor_id_2, patch_id_2, enable_2 ALTERNATIVE_CFG "\old_c", "\new_c_1", \vendor_id_1, \patch_id_1, \enable_1 - ALT_NEW_CONTENT \vendor_id_2, \patch_id_2, \enable_2, \new_c_2 + ALT_NEW_CONTENT \vendor_id_2, \patch_id_2, \enable_2, "\new_c_2" .endm #define __ALTERNATIVE_CFG(...) ALTERNATIVE_CFG __VA_ARGS__ |