src/sys/dev/mem, branch upstream/11.1.0

Remove Giant from /dev/mem and /dev/kmem. It is definitely not needed

2015-01-24T12:51:15+00:00

for i386, and from the code inspection, nothing in the
arm/mips/sparc64 implementations depends on it.

Discussed with:	imp, nwhitehorn
Sponsored by:	The FreeBSD Foundation
MFC after:	3 weeks

Add new privileges, PRIV_KMEM_READ and PRIV_KMEM_WRITE, used in opening

2013-07-05T21:31:16+00:00

/dev/kmem and /dev/mem (in addition to traditional file permission checks).
PRIV_KMEM_READ is different from other PRIV_* checks in that it's allowed
by default.

Reviewed by:	kib, mckusick

Add reader/writer lock around mem_range_attr_get() and mem_range_attr_set().

2011-01-17T22:58:28+00:00

Compile sys/dev/mem/memutil.c for all supported platforms and remove now
unnecessary dev_mem_md_init().  Consistently define mem_range_softc from
mem.c for all platforms.  Add missing #include guards for machine/memdev.h
and sys/memrange.h.  Clean up some nearby style(9) nits.

MFC after:	1 month

Fix module builds for i386 and amd64.

2004-08-04T18:30:31+00:00

Add module versions.

2004-08-02T20:42:28+00:00

Break out the MI part of the /dev/[k]mem and /dev/io drivers into

2004-08-01T11:40:54+00:00

their own directory and module, leaving the MD parts in the MD
area (the MD parts _are_ part of the modules). /dev/mem and /dev/io
are now loadable modules, thus taking us one step further towards
a kernel created entirely out of modules. Of course, there is nothing
preventing the kernel from having these statically compiled.