aboutsummaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-21 16:38:26 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-21 16:38:26 -0500
commit0f5c2ac58f22fd41deaeeb45ee752d4ae55f0d01 (patch)
tree6e13ef4d7247e53d7a0f18e04549a8847cc80214 /kernel
parentcfd74486eace27a0899b30529d01bc1a09a5b973 (diff)
parentdfff95c394b0dd977a6b65bd52b99703fae94d9b (diff)
Merge branch 'irq-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (37 commits) um: Use generic irq Kconfig tile: Use generic irq Kconfig sparc: Use generic irq Kconfig score: Use generic irq Kconfig powerpc: Use generic irq Kconfig parisc: Use generic irq Kconfig mn10300: Use generic irq Kconfig microblaze: Use generic irq Kconfig m68knommu: Use generic irq Kconfig ia64: Use generic irq Kconfig frv: Use generic irq Kconfig blackfin: Use generic irq Kconfig alpha: Use generic irq Kconfig genirq: Remove __do_IRQ m32r: Convert to generic irq Kconfig m32r: Convert usrv platform irq handling m32r: Convert opsput_lcdpld irq chip m32r: Convert opsput lanpld irq chip m32r: Convert opsput pld irq chip m32r: Convert opsput irq chip ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/Kconfig3
-rw-r--r--kernel/irq/handle.c111
2 files changed, 0 insertions, 114 deletions
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 31d766bf5d2e..8e42fec7686d 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -9,9 +9,6 @@ menu "IRQ subsystem"
9config GENERIC_HARDIRQS 9config GENERIC_HARDIRQS
10 def_bool y 10 def_bool y
11 11
12config GENERIC_HARDIRQS_NO__DO_IRQ
13 def_bool y
14
15# Select this to disable the deprecated stuff 12# Select this to disable the deprecated stuff
16config GENERIC_HARDIRQS_NO_DEPRECATED 13config GENERIC_HARDIRQS_NO_DEPRECATED
17 def_bool n 14 def_bool n
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index e2347eb63306..3540a7190122 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -118,114 +118,3 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
118 118
119 return retval; 119 return retval;
120} 120}
121
122#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
123
124#ifdef CONFIG_ENABLE_WARN_DEPRECATED
125# warning __do_IRQ is deprecated. Please convert to proper flow handlers
126#endif
127
128/**
129 * __do_IRQ - original all in one highlevel IRQ handler
130 * @irq: the interrupt number
131 *
132 * __do_IRQ handles all normal device IRQ's (the special
133 * SMP cross-CPU interrupts have their own specific
134 * handlers).
135 *
136 * This is the original x86 implementation which is used for every
137 * interrupt type.
138 */
139unsigned int __do_IRQ(unsigned int irq)
140{
141 struct irq_desc *desc = irq_to_desc(irq);
142 struct irqaction *action;
143 unsigned int status;
144
145 kstat_incr_irqs_this_cpu(irq, desc);
146
147 if (CHECK_IRQ_PER_CPU(desc->status)) {
148 irqreturn_t action_ret;
149
150 /*
151 * No locking required for CPU-local interrupts:
152 */
153 if (desc->irq_data.chip->ack)
154 desc->irq_data.chip->ack(irq);
155 if (likely(!(desc->status & IRQ_DISABLED))) {
156 action_ret = handle_IRQ_event(irq, desc->action);
157 if (!noirqdebug)
158 note_interrupt(irq, desc, action_ret);
159 }
160 desc->irq_data.chip->end(irq);
161 return 1;
162 }
163
164 raw_spin_lock(&desc->lock);
165 if (desc->irq_data.chip->ack)
166 desc->irq_data.chip->ack(irq);
167 /*
168 * REPLAY is when Linux resends an IRQ that was dropped earlier
169 * WAITING is used by probe to mark irqs that are being tested
170 */
171 status = desc->status & ~(IRQ_REPLAY | IRQ_WAITING);
172 status |= IRQ_PENDING; /* we _want_ to handle it */
173
174 /*
175 * If the IRQ is disabled for whatever reason, we cannot
176 * use the action we have.
177 */
178 action = NULL;
179 if (likely(!(status & (IRQ_DISABLED | IRQ_INPROGRESS)))) {
180 action = desc->action;
181 status &= ~IRQ_PENDING; /* we commit to handling */
182 status |= IRQ_INPROGRESS; /* we are handling it */
183 }
184 desc->status = status;
185
186 /*
187 * If there is no IRQ handler or it was disabled, exit early.
188 * Since we set PENDING, if another processor is handling
189 * a different instance of this same irq, the other processor
190 * will take care of it.
191 */
192 if (unlikely(!action))
193 goto out;
194
195 /*
196 * Edge triggered interrupts need to remember
197 * pending events.
198 * This applies to any hw interrupts that allow a second
199 * instance of the same irq to arrive while we are in do_IRQ
200 * or in the handler. But the code here only handles the _second_
201 * instance of the irq, not the third or fourth. So it is mostly
202 * useful for irq hardware that does not mask cleanly in an
203 * SMP environment.
204 */
205 for (;;) {
206 irqreturn_t action_ret;
207
208 raw_spin_unlock(&desc->lock);
209
210 action_ret = handle_IRQ_event(irq, action);
211 if (!noirqdebug)
212 note_interrupt(irq, desc, action_ret);
213
214 raw_spin_lock(&desc->lock);
215 if (likely(!(desc->status & IRQ_PENDING)))
216 break;
217 desc->status &= ~IRQ_PENDING;
218 }
219 desc->status &= ~IRQ_INPROGRESS;
220
221out:
222 /*
223 * The ->end() handler has to deal with interrupts which got
224 * disabled while the handler was running.
225 */
226 desc->irq_data.chip->end(irq);
227 raw_spin_unlock(&desc->lock);
228
229 return 1;
230}
231#endif