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| author | Emese Revfy <re.emese@gmail.com> | 2016-06-20 20:42:34 +0200 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2016-10-10 14:51:45 -0700 |
| commit | 0766f788eb727e2e330d55d30545db65bcf2623f (patch) | |
| tree | 0436ae3b005558a4fb827459fe5c602037fe764a /include/linux/genhd.h | |
| parent | 38addce8b600ca335dc86fa3d48c890f1c6fa1f4 (diff) | |
| download | linux-0766f788eb727e2e330d55d30545db65bcf2623f.tar.gz linux-0766f788eb727e2e330d55d30545db65bcf2623f.tar.bz2 linux-0766f788eb727e2e330d55d30545db65bcf2623f.zip | |
latent_entropy: Mark functions with __latent_entropy
The __latent_entropy gcc attribute can be used only on functions and
variables. If it is on a function then the plugin will instrument it for
gathering control-flow entropy. If the attribute is on a variable then
the plugin will initialize it with random contents. The variable must
be an integer, an integer array type or a structure with integer fields.
These specific functions have been selected because they are init
functions (to help gather boot-time entropy), are called at unpredictable
times, or they have variable loops, each of which provide some level of
latent entropy.
Signed-off-by: Emese Revfy <re.emese@gmail.com>
[kees: expanded commit message]
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'include/linux/genhd.h')
| -rw-r--r-- | include/linux/genhd.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 1dbf52f9c24b..e0341af6950e 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -437,7 +437,7 @@ extern void disk_flush_events(struct gendisk *disk, unsigned int mask); extern unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask); /* drivers/char/random.c */ -extern void add_disk_randomness(struct gendisk *disk); +extern void add_disk_randomness(struct gendisk *disk) __latent_entropy; extern void rand_initialize_disk(struct gendisk *disk); static inline sector_t get_start_sect(struct block_device *bdev) |