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From: Manfred Spraul <manfred@colorfullife.com>
cleanup of sysv ipc as a preparation for posix message queues:
- replace !CONFIG_SYSVIPC wrappers for copy_semundo and exit_sem with
static inline wrappers. Now the whole ipc/util.c file is only used if
CONFIG_SYSVIPC is set, use makefile magic instead of #ifdef.
- remove the prototypes for copy_semundo and exit_sem from kernel/fork.c
- they belong into a header file.
- create a new msgutil.c with the helper functions for message queues.
- cleanup the helper functions: run Lindent, add __user tags.
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From: "Randy.Dunlap" <rddunlap@osdl.org>
Add syscalls.h, which contains prototypes for the kernel's system calls.
Replace open-coded declarations all over the place. This patch found a
couple of prior bugs. It appears to be more important with -mregparm=3 as we
discover more asmlinkage mismatches.
Some syscalls have arch-dependent arguments, so their prototypes are in the
arch-specific unistd.h. Maybe it should have been asm/syscalls.h, but there
were already arch-specific syscall prototypes in asm/unistd.h...
Tested on x86, ia64, x86_64, ppc64, s390 and sparc64. May cause
trivial-to-fix build breakage on other architectures.
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msg.h uses list_head. (I'm not sure what config actually required this, but
it is legit).
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This patch adds the remaining System V IPC hooks, including the inline
documentation for them in security.h. This includes a restored
sem_semop hook, as it does seem to be necessary to support fine-grained
access.
All of these System V IPC hooks are used by SELinux. The SELinux System
V IPC access controls were originally described in the technical report
available from http://www.nsa.gov/selinux/slinux-abs.html, and the
LSM-based implementation is described in the technical report available
from http://www.nsa.gov/selinux/module-abs.html.
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msg.c file to the msg.h file
Also move where the msg->q_perm.mode and .key values get set to before
ipc_addid() gets called to make placing a hook there easier.
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