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| /freebsd-10.2-release/sys/ia64/include/ | ||
| H A D | cpufunc.h | diff 115295 Sat May 24 21:44:24 MDT 2003 marcel Be more careful how we restore interrupts. Don't rewrite most of the PSR only to achieve setting PSR.i back to it's previous value. It makes it impossible to change any of the 30+ other unrelated bits when done between intr_disable() and intr_restore(). That's bad. Instead have intr_disable() return 1 when interrupts were previously enabled and 0 otherwise and only enable interrupts in intr_restore() when given a non-0 value. This change specifically disallows using intr_restore() to disable interrupts. The reason is simple: interrupts only need to be restored after they are being disabled, which means that intr_restore() is called with interrupts disabled and we only need to enable them if they were previously enabled. This change does not fix any bugs, other than that it bugged me... Approved by: re@ (blanket) |
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