Konstantin Belousov 140dedb81c The r241025 fixed the case when a binary, executed from nullfs mount, ... was still possible to open for write from the lower filesystem. There is a symmetric situation where the binary could already has file descriptors opened for write, but it can be executed from the nullfs overlay. Handle the issue by passing one v_writecount reference to the lower vnode if nullfs vnode has non-zero v_writecount. Note that only one write reference can be donated, since nullfs only keeps one use reference on the lower vnode. Always use the lower vnode v_writecount for the checks. Introduce the VOP_GET_WRITECOUNT to read v_writecount, which is currently always bypassed to the lower vnode, and VOP_ADD_WRITECOUNT to manipulate the v_writecount value, which manages a single bypass reference to the lower vnode. Caling the VOPs instead of directly accessing v_writecount provide the fix described in the previous paragraph. Tested by: pho MFC after: 3 weeks		2012-11-02 13:56:36 +00:00
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acpica	This isn't functionally identical. In some cases a hint to disable	2012-10-22 13:06:09 +00:00
bios	This isn't functionally identical. In some cases a hint to disable	2012-10-22 13:06:09 +00:00
compile
conf	Add the mps(4) driver to the i386 GENERIC config file. LSI has tested it	2012-10-01 21:42:32 +00:00
i386	Add missed sched_pin().	2012-10-24 18:21:22 +00:00
ibcs2	The r241025 fixed the case when a binary, executed from nullfs mount,	2012-11-02 13:56:36 +00:00
include	Add an unified macro to deny ability from the compiler to reorder	2012-10-09 14:32:30 +00:00
isa	Revert previous commit...	2012-10-10 08:36:38 +00:00
linux	Revert previous commit...	2012-10-10 08:36:38 +00:00
pci	pciereg_cfg*: use assembly to access the mem-mapped cfg space	2012-10-14 10:13:50 +00:00
svr4
xbox
xen	Replace all uses of the vm page queues lock by a new R/W lock.	2012-10-12 23:26:00 +00:00
Makefile