John Baldwin 0108cce0a4 Adjust the order of operations in spinlock_enter() and spinlock_exit() to ... work properly with single-stepping in a kernel debugger. Specifically, these routines have always disabled interrupts before increasing the nesting count and restored the prior state of interrupts after decreasing the nesting count to avoid problems with a nested interrupt not disabling interrupts when acquiring a spin lock. However, trap interrupts for single-stepping can still occur even when interrupts are disabled. Now the saved state of interrupts is not saved in the thread until after interrupts have been disabled and the nesting count has been increased. Similarly, the saved state from the thread cannot be read once the nesting count has been decreased to zero. To fix this, use temporary variables to store interrupt state and shuffle it between the thread's MD area and the appropriate registers. In cooperation with: bde MFC after: 1 month		2010-11-05 13:42:58 +00:00
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acpica	Add acpi_find_table() -- a convenience function for looking up an	2010-07-07 20:07:33 +00:00
compile
conf	Add MALLOC_DEBUG_MAXZONES debug malloc(9) option to use multiple uma	2010-07-28 15:36:12 +00:00
disasm
ia32	Prefer struct sysentvec sv_psstrings to hardcoding FREEBSD32_PS_STRINGS	2010-08-07 11:57:13 +00:00
ia64	Adjust the order of operations in spinlock_enter() and spinlock_exit() to	2010-11-05 13:42:58 +00:00
include	Remove clauses 3 and 4, per changes to NetBSD versions of these files.	2010-09-25 04:41:42 +00:00
isa	Remove isa_irq_pending(). It's not used.	2009-04-24 03:43:20 +00:00
pci	Disable interrupts when calling into SAL for PCI configuration	2010-03-22 03:06:11 +00:00