diff options
| author | Matt Mackall <mpm@selenic.com> | 2008-04-29 12:02:56 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 19:06:24 +0400 |
| commit | 88c730da8c8b20fa732221725347bd9460842bac (patch) | |
| tree | f792b1a388eb4b5c74bfcda340ea207701efa5aa /drivers/char/random.c | |
| parent | 90b75ee54666fe615ebcacfc8d8540b80afdedd5 (diff) | |
| download | linux-88c730da8c8b20fa732221725347bd9460842bac.tar.xz | |
random: consolidate wakeup logic
Signed-off-by: Matt Mackall <mpm@selenic.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/random.c')
| -rw-r--r-- | drivers/char/random.c | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 32118598a71b..46944088cf94 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -540,6 +540,10 @@ static void credit_entropy_store(struct entropy_store *r, int nbits) nbits, r->name); } + /* should we wake readers? */ + if (r == &input_pool && r->entropy_count >= random_read_wakeup_thresh) + wake_up_interruptible(&random_read_wait); + spin_unlock_irqrestore(&r->lock, flags); } @@ -624,10 +628,6 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num) credit_entropy_store(&input_pool, min_t(int, fls(delta>>1), 11)); } - - if (input_pool.entropy_count >= random_read_wakeup_thresh) - wake_up_interruptible(&random_read_wait); - out: preempt_enable(); } @@ -1081,12 +1081,6 @@ static int random_ioctl(struct inode *inode, struct file *file, if (get_user(ent_count, p)) return -EFAULT; credit_entropy_store(&input_pool, ent_count); - /* - * Wake up waiting processes if we have enough - * entropy. - */ - if (input_pool.entropy_count >= random_read_wakeup_thresh) - wake_up_interruptible(&random_read_wait); return 0; case RNDADDENTROPY: if (!capable(CAP_SYS_ADMIN)) @@ -1102,12 +1096,6 @@ static int random_ioctl(struct inode *inode, struct file *file, if (retval < 0) return retval; credit_entropy_store(&input_pool, ent_count); - /* - * Wake up waiting processes if we have enough - * entropy. - */ - if (input_pool.entropy_count >= random_read_wakeup_thresh) - wake_up_interruptible(&random_read_wait); return 0; case RNDZAPENTCNT: case RNDCLEARPOOL: |