[PATCH] crypto: jitterentropy: Add automatically deoptimization.
From: dm9pZCAq <hidden>
Date: 2021-02-22 23:27:06
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
This is needed to compile with `CFLAGS_KERNEL=-O2`. Due to `CFLAGS_jitterentropy.o = -O0` comes after `CFLAGS_KERNEL` the code is still optimized and gives an error. This patch deoptimizes the code despite any `CFLAGS`. Signed-off-by: dm9pZCAq <redacted> --- crypto/jitterentropy.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/crypto/jitterentropy.c b/crypto/jitterentropy.c
index 6e147c43fc18..7d84bc10626f 100644
--- a/crypto/jitterentropy.c
+++ b/crypto/jitterentropy.c@@ -50,7 +50,14 @@ * version 2.2.0 provided at https://www.chronox.de/jent.html */ -#ifdef __OPTIMIZE__ + +#ifdef __clang__ + #pragma clang optimize off +#else + #pragma GCC optimize ("O0") +#endif + +#if !defined(__clang__) && defined(__OPTIMIZE__) #error "The CPU Jitter random number generator must not be compiled with optimizations. See documentation. Use the compiler switch -O0 for compiling jitterentropy.c." #endif
--
2.30.1