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| author | Theodore Ts'o <tytso@mit.edu> | 2013-09-12 20:10:25 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-10-10 20:32:16 +0200 |
| commit | 5910895f0e868d4f70303922ed00ccdc328b3c30 (patch) | |
| tree | c51b3a58cad1a18e941f1d0ed1c56747944aa3cc /drivers/char/random.c | |
| parent | random: account for entropy loss due to overwrites (diff) | |
| download | linux-5910895f0e868d4f70303922ed00ccdc328b3c30.tar.xz linux-5910895f0e868d4f70303922ed00ccdc328b3c30.zip | |
random: fix the tracepoint for get_random_bytes(_arch)
Fix a problem where get_random_bytes_arch() was calling the tracepoint
get_random_bytes(). So add a new tracepoint for
get_random_bytes_arch(), and make get_random_bytes() and
get_random_bytes_arch() call their correct tracepoint.
Also, add a new tracepoint for add_device_randomness()
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'drivers/char/random.c')
| -rw-r--r-- | drivers/char/random.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 867b823e7fea..80b58774e891 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -711,6 +711,7 @@ void add_device_randomness(const void *buf, unsigned int size) { unsigned long time = random_get_entropy() ^ jiffies; + trace_add_device_randomness(size, _RET_IP_); mix_pool_bytes(&input_pool, buf, size, NULL); mix_pool_bytes(&input_pool, &time, sizeof(time), NULL); mix_pool_bytes(&nonblocking_pool, buf, size, NULL); @@ -1127,6 +1128,7 @@ static ssize_t extract_entropy_user(struct entropy_store *r, void __user *buf, */ void get_random_bytes(void *buf, int nbytes) { + trace_get_random_bytes(nbytes, _RET_IP_); extract_entropy(&nonblocking_pool, buf, nbytes, 0, 0); } EXPORT_SYMBOL(get_random_bytes); @@ -1145,7 +1147,7 @@ void get_random_bytes_arch(void *buf, int nbytes) { char *p = buf; - trace_get_random_bytes(nbytes, _RET_IP_); + trace_get_random_bytes_arch(nbytes, _RET_IP_); while (nbytes) { unsigned long v; int chunk = min(nbytes, (int)sizeof(unsigned long)); |