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| author | Ian Molton <ian.molton@collabora.co.uk> | 2009-12-03 08:50:42 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-12-03 08:50:42 +0300 |
| commit | eed89d0f9d3383851cec634565a6414fae70fe91 (patch) | |
| tree | ec1bd56b152d2b5a53a20aa7fde21a60ce794c9c /drivers/char/hw_random | |
| parent | bb347d98079a547e80bd4722dee1de61e4dca0e8 (diff) | |
| download | linux-eed89d0f9d3383851cec634565a6414fae70fe91.tar.xz | |
hwrng: core - Prevent too-small buffer sizes
This patch prevents the hw_random core using too small of a buffer
on machines with small cacheline sizes.
Signed-off-by: Ian Molton <ian.molton@collabora.co.uk>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random')
| -rw-r--r-- | drivers/char/hw_random/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 5c2d13c6e189..8b7d56a0fe3a 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -53,7 +53,8 @@ static struct hwrng *current_rng; static LIST_HEAD(rng_list); static DEFINE_MUTEX(rng_mutex); static int data_avail; -static u8 rng_buffer[SMP_CACHE_BYTES] __cacheline_aligned; +static u8 rng_buffer[SMP_CACHE_BYTES < 32 ? 32 : SMP_CACHE_BYTES] + __cacheline_aligned; static inline int hwrng_init(struct hwrng *rng) { |