Alan Cox 031102cc7b Use an atomic op to update the pte in pmap_protect(). This is to prevent ... the loss of a page modified (PG_M) bit in a race between processors. Quoting Tor: One scenario where the old code could cause a lost PG_M bit is a multithreaded linux program (or FreeBSD program using the linuxthreads port) where one thread was starting a subprocess. The thread doing fork() would call vmspace_fork(), which would then call vm_map_copy_entry() which would call pmap_protect() on an area possibly accessed by other threads. Additionally, make the clearing of PG_M by pmap_protect() unconditional if write permission is removed. Previously, PG_M could persist on a read-only unmanaged page. That seems inconsistent and confusing. In collaboration with: tegge@ MT5 candidate PR: 61852		2004-09-12 20:20:40 +00:00
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acpica	Be sure to always unlock the sx lock when exiting the sysctl function.	2004-08-24 17:53:25 +00:00
bios	Clarify SDT feature word bits.	2004-08-31 21:51:51 +00:00
compile
conf	Add device driver support for the VIA Networking Technologies	2004-09-10 20:57:46 +00:00
cpufreq	o Fix whitespace bug introduced in the previous commit.	2004-08-23 10:09:29 +00:00
i386	Use an atomic op to update the pte in pmap_protect(). This is to prevent	2004-09-12 20:20:40 +00:00
ibcs2	Regenerate after fcntl() wrappers were marked MP safe.	2004-08-24 20:24:34 +00:00
include	Double the number of kernel page tables for amd64 and for i386/PAE. The old	2004-09-11 01:31:26 +00:00
isa	Optimize intr_execute_handlers() by combining the pic_disable_source() and	2004-08-02 15:31:10 +00:00
linux	Regen.	2004-09-06 09:33:30 +00:00
pci	Consistently use __inline instead of __inline__ as the former is an empty macro	2004-07-04 16:11:03 +00:00
svr4
Makefile