diff options
| author | James Morris <jmorris@namei.org> | 2008-09-21 17:41:56 -0700 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-09-21 17:41:56 -0700 |
| commit | ab2b49518e743962f71b94246855c44ee9cf52cc (patch) | |
| tree | 26b260a350f0a0a0d19b558bf147b812e3a1564c /drivers/char | |
| parent | f058925b201357fba48d56cc9c1719ae274b2022 (diff) | |
| parent | 72d31053f62c4bc464c2783974926969614a8649 (diff) | |
Merge branch 'master' into next
Conflicts:
MAINTAINERS
Thanks for breaking my tree :-)
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/random.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 1838aa3d24f..7ce1ac4baa6 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -407,7 +407,7 @@ struct entropy_store { /* read-write data: */ spinlock_t lock; unsigned add_ptr; - int entropy_count; + int entropy_count; /* Must at no time exceed ->POOLBITS! */ int input_rotate; }; @@ -520,6 +520,7 @@ static void mix_pool_bytes(struct entropy_store *r, const void *in, int bytes) static void credit_entropy_bits(struct entropy_store *r, int nbits) { unsigned long flags; + int entropy_count; if (!nbits) return; @@ -527,20 +528,20 @@ static void credit_entropy_bits(struct entropy_store *r, int nbits) spin_lock_irqsave(&r->lock, flags); DEBUG_ENT("added %d entropy credits to %s\n", nbits, r->name); - r->entropy_count += nbits; - if (r->entropy_count < 0) { + entropy_count = r->entropy_count; + entropy_count += nbits; + if (entropy_count < 0) { DEBUG_ENT("negative entropy/overflow\n"); - r->entropy_count = 0; - } else if (r->entropy_count > r->poolinfo->POOLBITS) - r->entropy_count = r->poolinfo->POOLBITS; + entropy_count = 0; + } else if (entropy_count > r->poolinfo->POOLBITS) + entropy_count = r->poolinfo->POOLBITS; + r->entropy_count = entropy_count; /* should we wake readers? */ - if (r == &input_pool && - r->entropy_count >= random_read_wakeup_thresh) { + if (r == &input_pool && entropy_count >= random_read_wakeup_thresh) { wake_up_interruptible(&random_read_wait); kill_fasync(&fasync, SIGIO, POLL_IN); } - spin_unlock_irqrestore(&r->lock, flags); } |