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| author | Olof Johansson <olof@lixom.net> | 2019-12-17 05:06:31 +0100 |
|---|---|---|
| committer | Paul Walmsley <paul.walmsley@sifive.com> | 2020-01-19 04:13:41 +0100 |
| commit | fc585d4a5cf614727f64d86550b794bcad29d5c3 (patch) | |
| tree | fa9276255c794cd150ea01ebf1c5ac0aa1ddccfe /arch/riscv/include | |
| parent | riscv: delete temporary files (diff) | |
| download | linux-fc585d4a5cf614727f64d86550b794bcad29d5c3.tar.xz linux-fc585d4a5cf614727f64d86550b794bcad29d5c3.zip | |
riscv: Less inefficient gcc tishift helpers (and export their symbols)
The existing __lshrti3 was really inefficient, and the other two helpers
are also needed to compile some modules.
Add the missing versions, and export all of the symbols like arm64
already does.
This code is based on the assembly generated by libgcc builds.
This fixes a build break triggered by ubsan:
riscv64-unknown-linux-gnu-ld: lib/ubsan.o: in function `.L2':
ubsan.c:(.text.unlikely+0x38): undefined reference to `__ashlti3'
riscv64-unknown-linux-gnu-ld: ubsan.c:(.text.unlikely+0x42): undefined reference to `__ashrti3'
Signed-off-by: Olof Johansson <olof@lixom.net>
[paul.walmsley@sifive.com: use SYM_FUNC_{START,END} instead of
ENTRY/ENDPROC; note libgcc origin]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/asm-prototypes.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/asm-prototypes.h b/arch/riscv/include/asm/asm-prototypes.h index dd62b691c443..27e005fca584 100644 --- a/arch/riscv/include/asm/asm-prototypes.h +++ b/arch/riscv/include/asm/asm-prototypes.h @@ -5,4 +5,8 @@ #include <linux/ftrace.h> #include <asm-generic/asm-prototypes.h> +long long __lshrti3(long long a, int b); +long long __ashrti3(long long a, int b); +long long __ashlti3(long long a, int b); + #endif /* _ASM_RISCV_PROTOTYPES_H */ |