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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-14 14:29:49 +1000 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-14 14:29:49 +1000 |
commit | 11c2d8174ed3dc4f1971564732689b4a39129702 (patch) | |
tree | ac00daa548ea8ac24ae7a5c8062312e335ab9858 /kernel/capability.c | |
parent | cde274c0c789404df8ece3f9e7d6506caf0127e2 (diff) | |
parent | bce7f793daec3e65ec5c5705d2457b81fe7b5725 (diff) | |
download | op-kernel-dev-11c2d8174ed3dc4f1971564732689b4a39129702.zip op-kernel-dev-11c2d8174ed3dc4f1971564732689b4a39129702.tar.gz |
Merge commit 'origin/HEAD' into test-merge
Manual fixup of include/asm-powerpc/pgtable-ppc64.h
Diffstat (limited to 'kernel/capability.c')
-rw-r--r-- | kernel/capability.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/capability.c b/kernel/capability.c index cfbe442..901e0fd 100644 --- a/kernel/capability.c +++ b/kernel/capability.c @@ -121,6 +121,27 @@ static int cap_validate_magic(cap_user_header_t header, unsigned *tocopy) * uninteresting and/or not to be changed. */ +/* + * Atomically modify the effective capabilities returning the original + * value. No permission check is performed here - it is assumed that the + * caller is permitted to set the desired effective capabilities. + */ +kernel_cap_t cap_set_effective(const kernel_cap_t pE_new) +{ + kernel_cap_t pE_old; + + spin_lock(&task_capability_lock); + + pE_old = current->cap_effective; + current->cap_effective = pE_new; + + spin_unlock(&task_capability_lock); + + return pE_old; +} + +EXPORT_SYMBOL(cap_set_effective); + /** * sys_capget - get the capabilities of a given process. * @header: pointer to struct that contains capability version and |