Messages in this thread Patch in this message | | | From | Russell Currey <> | Subject | [PATCH v2 2/7] powerpc/secvar: WARN_ON_ONCE() if multiple secvar ops are set | Date | Fri, 30 Dec 2022 15:20:09 +1100 |
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The secvar code only supports one consumer at a time.
Multiple consumers aren't possible at this point in time, but we'd want it to be obvious if it ever could happen.
Signed-off-by: Russell Currey <ruscur@russell.cc> --- arch/powerpc/kernel/secvar-ops.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/secvar-ops.c b/arch/powerpc/kernel/secvar-ops.c index 6a29777d6a2d..aa1b2adc2710 100644 --- a/arch/powerpc/kernel/secvar-ops.c +++ b/arch/powerpc/kernel/secvar-ops.c @@ -8,10 +8,12 @@ #include <linux/cache.h> #include <asm/secvar.h> +#include <asm/bug.h> -const struct secvar_operations *secvar_ops __ro_after_init; +const struct secvar_operations *secvar_ops __ro_after_init = NULL; void set_secvar_ops(const struct secvar_operations *ops) { + WARN_ON_ONCE(secvar_ops); secvar_ops = ops; } -- 2.38.1
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