Retire the INTR_FAST flag as it was obsoleted by the introduction of the

filter argument to bus_setup_intr().

share/man/man9/BUS_SETUP_INTR.9

@@ -85,9 +85,8 @@ marks the interrupt as being a good source of entropy -
 this may be used by the entropy device
 .Pa /dev/random .
 .Pp
-To define a time-critical handler (previously known as
-.Dv INTR_FAST )
-that will not execute any potentially blocking operation, use the
+To define a time-critical handler that will not execute any potentially
+blocking operation, use the
 .Fa filter
 argument.
 See the
@@ -128,10 +127,7 @@ will no longer be called.
 .Pp
 Mutexes are not allowed to be held across calls to these functions.
 .Ss "Filter Routines"
-A filter runs in a context very similar to what was known as an
-.Dv INTR_FAST
-routine in previous versions of 
-.Fx .
+A filter runs in primary interrupt context.
 In this context, normal mutexes cannot be used.
 Only the spin lock version of these can be used (specified by passing
 .Dv MTX_SPIN 

share/man/man9/ithread.9

@@ -180,15 +180,6 @@ The
 flag specifies that this handler cannot share an interrupt thread with
 another handler.
 The
-.Dv INTR_FAST
-flag specifies that when this handler is executed, it should be run immediately
-rather than being run asynchronously when its interrupt thread is scheduled to
-run.
-The
-.Dv INTR_FAST
-flag implies
-.Dv INTR_EXCL .
-The
 .Dv INTR_MPSAFE
 flag specifies that this handler is MP safe in that it does not need the
 Giant mutex to be held while it is executed.
@@ -198,10 +189,8 @@ flag specifies that the interrupt source this handler is tied to is a good
 source of entropy, and thus that entropy should be gathered when an interrupt
 from the handler's source triggers.
 Presently, the
-.Dv INTR_FAST
-and
 .Dv INTR_ENTROPY
-flags are not valid for software interrupt handlers.
+flag is not valid for software interrupt handlers.
 .Pp
 It is not permitted to sleep in an interrupt thread; hence, any memory
 or zone allocations in an interrupt thread should be specified with the
@@ -237,7 +226,7 @@ swi_add(struct ithd **ithdp, const char *name, driver_intr_t handler,
 	struct ithd *ithd;
 	int error;
 
-	if (flags & (INTR_FAST | INTR_ENTROPY))
+	if (flags & INTR_ENTROPY)
 		return (EINVAL);
 
 	ithd = (ithdp != NULL) ? *ithdp : NULL;

share/man/man9/mutex.9

@@ -128,9 +128,7 @@ Mutexes which do not context switch are
 mutexes.
 These should only be used to protect data shared with primary interrupt
 code.
-This includes
-.Dv INTR_FAST
-interrupt handlers and low level scheduling code.
+This includes interrupt filters and low level scheduling code.
 In all architectures both acquiring and releasing of a
 uncontested spin mutex is more expensive than the same operation
 on a non-spin mutex.

share/man/man9/swi.9

@@ -179,10 +179,8 @@ MIB variable
 .It Bq Er EINVAL
 The
 .Fa flags
-argument specifies either
-.Dv INTR_ENTROPY
-or
-.Dv INTR_FAST .
+argument specifies
+.Dv INTR_ENTROPY .
 .It Bq Er EINVAL
 The
 .Fa ithdp

sys/sys/bus.h

@@ -191,7 +191,6 @@ enum intr_type {
 	INTR_TYPE_MISC = 16,
 	INTR_TYPE_CLK = 32,
 	INTR_TYPE_AV = 64,
-	INTR_FAST = 128,
 	INTR_EXCL = 256,		/* exclusive interrupt */
 	INTR_MPSAFE = 512,		/* this interrupt is SMP safe */
 	INTR_ENTROPY = 1024,		/* this interrupt provides entropy */