http://www.kvack.org/~blah/v2.5.23-cred.diff
Several parts of the kernel need to obtain a reference to the
credentials of a process: aio, nfs, dirty mmap writebacks to
name a few. Additionally, POSIX threads need to be able to share
credentials between clones. The patch below moves the credentials
out of task_struct and into struct cred, which is reference
counted. It also adds support for CLONE_CRED which shares the
credentials between threads. Comments?
-ben
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