Patch from: Matthew Wilcox <willy@debian.org>
Reduces stack use in random.c by 350 (or maybe 700) bytes by sharing a local
array between two functions.
drivers/char/random.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff -puN drivers/char/random.c~random-stack-use drivers/char/random.c
--- 25/drivers/char/random.c~random-stack-use Mon Mar 3 12:08:26 2003
+++ 25-akpm/drivers/char/random.c Mon Mar 3 12:08:26 2003
@@ -1228,10 +1228,8 @@ static ssize_t extract_entropy(struct en
* at which point we do a "catastrophic reseeding".
*/
static inline void xfer_secondary_pool(struct entropy_store *r,
- size_t nbytes)
+ size_t nbytes, __u32 *tmp)
{
- __u32 tmp[TMP_BUF_SIZE];
-
if (r->entropy_count < nbytes * 8 &&
r->entropy_count < r->poolinfo.POOLBITS) {
int nwords = min_t(int,
@@ -1284,7 +1282,7 @@ static ssize_t extract_entropy(struct en
r->entropy_count = r->poolinfo.POOLBITS;
if (flags & EXTRACT_ENTROPY_SECONDARY)
- xfer_secondary_pool(r, nbytes);
+ xfer_secondary_pool(r, nbytes, tmp);
DEBUG_ENT("%s has %d bits, want %d bits\n",
r == sec_random_state ? "secondary" :
_