diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2024-09-25 19:50:22 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-09-30 19:19:43 +1000 |
| commit | 4b058c9f281f5b100efbf665dd5a1a05e1654d6d (patch) | |
| tree | 0c35d64a7fdc73211f3122804e0fecdffc709dd1 | |
| parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
powerpc/vdso: allow r30 in vDSO code generation of getrandom
For gettimeofday, -ffixed-r30 was passed to work around a bug in Go
code, where the vDSO trampoline forgot to save and restore this register
across function calls. But Go requires a different trampoline for every
call, and there's no reason that new Go code needs to be broken and add
more bugs. So remove -ffixed-r30 for getrandom.
Fixes: 8072b39c3a75 ("powerpc/vdso: Wire up getrandom() vDSO implementation on VDSO64")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240925175021.1526936-2-Jason@zx2c4.com
| -rw-r--r-- | arch/powerpc/kernel/vdso/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/vdso/Makefile b/arch/powerpc/kernel/vdso/Makefile index 56fb1633529a..31ca5a547004 100644 --- a/arch/powerpc/kernel/vdso/Makefile +++ b/arch/powerpc/kernel/vdso/Makefile @@ -22,7 +22,7 @@ endif ifneq ($(c-getrandom-y),) CFLAGS_vgetrandom-32.o += -include $(c-getrandom-y) - CFLAGS_vgetrandom-64.o += -include $(c-getrandom-y) $(call cc-option, -ffixed-r30) + CFLAGS_vgetrandom-64.o += -include $(c-getrandom-y) endif # Build rules |