Nathan Whitehorn e69dff491d Use the ABI-mandated thread pointer register (r2 for ppc32, r13 for ppc64) ... instead of a PCPU field for curthread. This averts a race on SMP systems with a high interrupt rate where the thread looking up the value of curthread could be preempted and migrated between obtaining the PCPU pointer and reading the value of pc_curthread, resulting in curthread being observed to be the current thread on the thread's original CPU. This played merry havoc with the system, in particular with mutexes. Many thanks to jhb for helping me work this one out. Note that Book-E is in principle susceptible to the same problem, but has not been modified yet due to lack of Book-E hardware. MFC after: 2 weeks		2011-06-23 22:21:28 +00:00
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clock.c	After some off-list discussion, revert a number of changes to the	2010-11-22 19:32:54 +00:00
copyinout.c	Use the ABI-mandated thread pointer register (r2 for ppc32, r13 for ppc64)	2011-06-23 22:21:28 +00:00
interrupt.c	Use the ABI-mandated thread pointer register (r2 for ppc32, r13 for ppc64)	2011-06-23 22:21:28 +00:00
locore.S	Better support different kernel hand-offs. When loaded directly	2011-05-28 04:10:44 +00:00
machdep.c	Better support different kernel hand-offs. When loaded directly	2011-05-28 04:10:44 +00:00
mp_cpudep.c	Add SMP support on U3-based G5 systems. This does not yet work perfectly:	2009-10-23 03:17:02 +00:00
platform_bare.c	MFC	2011-05-29 00:59:38 +00:00
pmap.c	MFC	2011-05-31 21:22:44 +00:00
swtch.S	MFppc64:	2010-07-13 05:32:19 +00:00
trap_subr.S	Use local TLB_UNLOCKED marker instead of MTX_UNOWNED for Book-E PowerPC trap	2010-11-11 13:35:23 +00:00
trap.c	Use the ABI-mandated thread pointer register (r2 for ppc32, r13 for ppc64)	2011-06-23 22:21:28 +00:00
vm_machdep.c	For architectures not using direct map , and requiring real KVA page for	2011-01-18 21:57:02 +00:00