summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorJoe Eykholt <jeykholt@cisco.com>2010-05-26 14:44:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-27 09:12:52 -0700
commit5960164fde9bc2f2a99e751d3393faea316e7e36 (patch)
treeeb4340c46fd459a9a078a9b994b5e940b68a875e /net
parent0a14a130cac9c6826bc81a089b12ab5cbb2b97fc (diff)
downloadlinux-3.10-5960164fde9bc2f2a99e751d3393faea316e7e36.tar.gz
linux-3.10-5960164fde9bc2f2a99e751d3393faea316e7e36.tar.bz2
linux-3.10-5960164fde9bc2f2a99e751d3393faea316e7e36.zip
lib/random32: export pseudo-random number generator for modules
This patch moves the definition of struct rnd_state and the inline __seed() function to linux/random.h. It renames the static __random32() function to prandom32() and exports it for use in modules. prandom32() is useful as a privately-seeded pseudo random number generator that can give the same result every time it is initialized. For FCoE FC-BB-6 VN2VN mode self-selected unique FC address generation, we need an pseudo-random number generator seeded with the 64-bit world-wide port name. A truly random generator or one seeded with randomness won't do because the same sequence of numbers should be generated each time we boot or the link comes up. A prandom32_seed() inline function is added to the header file. It is inlined not for speed, but so the function won't be expanded in the base kernel, but only in the module that uses it. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Acked-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 'net')
0 files changed, 0 insertions, 0 deletions