diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-15 10:03:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-15 10:03:15 -0700 |
| commit | 9ffc66941df278c9f4df979b6bcf6c6ddafedd16 (patch) | |
| tree | a2cff20aafb7ecb352a0c2dd41a5430f64a248e0 /include/linux/compiler-gcc.h | |
| parent | 133d970e0dadf7b413db19893acc5b26664bf4a1 (diff) | |
| parent | 0766f788eb727e2e330d55d30545db65bcf2623f (diff) | |
Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull gcc plugins update from Kees Cook:
"This adds a new gcc plugin named "latent_entropy". It is designed to
extract as much possible uncertainty from a running system at boot
time as possible, hoping to capitalize on any possible variation in
CPU operation (due to runtime data differences, hardware differences,
SMP ordering, thermal timing variation, cache behavior, etc).
At the very least, this plugin is a much more comprehensive example
for how to manipulate kernel code using the gcc plugin internals"
* tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
latent_entropy: Mark functions with __latent_entropy
gcc-plugins: Add latent_entropy plugin
Diffstat (limited to 'include/linux/compiler-gcc.h')
| -rw-r--r-- | include/linux/compiler-gcc.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 573c5a18908f..432f5c97e18f 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -188,6 +188,13 @@ #endif /* GCC_VERSION >= 40300 */ #if GCC_VERSION >= 40500 + +#ifndef __CHECKER__ +#ifdef LATENT_ENTROPY_PLUGIN +#define __latent_entropy __attribute__((latent_entropy)) +#endif +#endif + /* * Mark a position in code as unreachable. This can be used to * suppress control flow warnings after asm blocks that transfer |