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authorThomas Gleixner <tglx@linutronix.de>2010-02-17 21:23:03 -0500
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-02-18 22:52:32 -0500
commitd0eab3eb557250cead42f22e6f1a4f7e326757f9 (patch)
tree0f45e6be4c9729104a8ecef4b8948b2a2ee84c8b /arch/powerpc
parentf95e085b2531c86262b97a081eb0d1cf793606d3 (diff)
powerpc: Convert pmac_pic_lock to raw_spinlock
pmac_pic_lock needs to be a real spinlock in RT. Convert it to raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/powermac/pic.c38
1 files changed, 19 insertions, 19 deletions
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 3b62896f9a5b..630a533d0e59 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -57,7 +57,7 @@ static int max_irqs;
57static int max_real_irqs; 57static int max_real_irqs;
58static u32 level_mask[4]; 58static u32 level_mask[4];
59 59
60static DEFINE_SPINLOCK(pmac_pic_lock); 60static DEFINE_RAW_SPINLOCK(pmac_pic_lock);
61 61
62#define NR_MASK_WORDS ((NR_IRQS + 31) / 32) 62#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
63static unsigned long ppc_lost_interrupts[NR_MASK_WORDS]; 63static unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
@@ -85,7 +85,7 @@ static void pmac_mask_and_ack_irq(unsigned int virq)
85 int i = src >> 5; 85 int i = src >> 5;
86 unsigned long flags; 86 unsigned long flags;
87 87
88 spin_lock_irqsave(&pmac_pic_lock, flags); 88 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
89 __clear_bit(src, ppc_cached_irq_mask); 89 __clear_bit(src, ppc_cached_irq_mask);
90 if (__test_and_clear_bit(src, ppc_lost_interrupts)) 90 if (__test_and_clear_bit(src, ppc_lost_interrupts))
91 atomic_dec(&ppc_n_lost_interrupts); 91 atomic_dec(&ppc_n_lost_interrupts);
@@ -97,7 +97,7 @@ static void pmac_mask_and_ack_irq(unsigned int virq)
97 mb(); 97 mb();
98 } while((in_le32(&pmac_irq_hw[i]->enable) & bit) 98 } while((in_le32(&pmac_irq_hw[i]->enable) & bit)
99 != (ppc_cached_irq_mask[i] & bit)); 99 != (ppc_cached_irq_mask[i] & bit));
100 spin_unlock_irqrestore(&pmac_pic_lock, flags); 100 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
101} 101}
102 102
103static void pmac_ack_irq(unsigned int virq) 103static void pmac_ack_irq(unsigned int virq)
@@ -107,12 +107,12 @@ static void pmac_ack_irq(unsigned int virq)
107 int i = src >> 5; 107 int i = src >> 5;
108 unsigned long flags; 108 unsigned long flags;
109 109
110 spin_lock_irqsave(&pmac_pic_lock, flags); 110 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
111 if (__test_and_clear_bit(src, ppc_lost_interrupts)) 111 if (__test_and_clear_bit(src, ppc_lost_interrupts))
112 atomic_dec(&ppc_n_lost_interrupts); 112 atomic_dec(&ppc_n_lost_interrupts);
113 out_le32(&pmac_irq_hw[i]->ack, bit); 113 out_le32(&pmac_irq_hw[i]->ack, bit);
114 (void)in_le32(&pmac_irq_hw[i]->ack); 114 (void)in_le32(&pmac_irq_hw[i]->ack);
115 spin_unlock_irqrestore(&pmac_pic_lock, flags); 115 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
116} 116}
117 117
118static void __pmac_set_irq_mask(unsigned int irq_nr, int nokicklost) 118static void __pmac_set_irq_mask(unsigned int irq_nr, int nokicklost)
@@ -152,12 +152,12 @@ static unsigned int pmac_startup_irq(unsigned int virq)
152 unsigned long bit = 1UL << (src & 0x1f); 152 unsigned long bit = 1UL << (src & 0x1f);
153 int i = src >> 5; 153 int i = src >> 5;
154 154
155 spin_lock_irqsave(&pmac_pic_lock, flags); 155 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
156 if ((irq_to_desc(virq)->status & IRQ_LEVEL) == 0) 156 if ((irq_to_desc(virq)->status & IRQ_LEVEL) == 0)
157 out_le32(&pmac_irq_hw[i]->ack, bit); 157 out_le32(&pmac_irq_hw[i]->ack, bit);
158 __set_bit(src, ppc_cached_irq_mask); 158 __set_bit(src, ppc_cached_irq_mask);
159 __pmac_set_irq_mask(src, 0); 159 __pmac_set_irq_mask(src, 0);
160 spin_unlock_irqrestore(&pmac_pic_lock, flags); 160 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
161 161
162 return 0; 162 return 0;
163} 163}
@@ -167,10 +167,10 @@ static void pmac_mask_irq(unsigned int virq)
167 unsigned long flags; 167 unsigned long flags;
168 unsigned int src = irq_map[virq].hwirq; 168 unsigned int src = irq_map[virq].hwirq;
169 169
170 spin_lock_irqsave(&pmac_pic_lock, flags); 170 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
171 __clear_bit(src, ppc_cached_irq_mask); 171 __clear_bit(src, ppc_cached_irq_mask);
172 __pmac_set_irq_mask(src, 1); 172 __pmac_set_irq_mask(src, 1);
173 spin_unlock_irqrestore(&pmac_pic_lock, flags); 173 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
174} 174}
175 175
176static void pmac_unmask_irq(unsigned int virq) 176static void pmac_unmask_irq(unsigned int virq)
@@ -178,19 +178,19 @@ static void pmac_unmask_irq(unsigned int virq)
178 unsigned long flags; 178 unsigned long flags;
179 unsigned int src = irq_map[virq].hwirq; 179 unsigned int src = irq_map[virq].hwirq;
180 180
181 spin_lock_irqsave(&pmac_pic_lock, flags); 181 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
182 __set_bit(src, ppc_cached_irq_mask); 182 __set_bit(src, ppc_cached_irq_mask);
183 __pmac_set_irq_mask(src, 0); 183 __pmac_set_irq_mask(src, 0);
184 spin_unlock_irqrestore(&pmac_pic_lock, flags); 184 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
185} 185}
186 186
187static int pmac_retrigger(unsigned int virq) 187static int pmac_retrigger(unsigned int virq)
188{ 188{
189 unsigned long flags; 189 unsigned long flags;
190 190
191 spin_lock_irqsave(&pmac_pic_lock, flags); 191 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
192 __pmac_retrigger(irq_map[virq].hwirq); 192 __pmac_retrigger(irq_map[virq].hwirq);
193 spin_unlock_irqrestore(&pmac_pic_lock, flags); 193 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
194 return 1; 194 return 1;
195} 195}
196 196
@@ -210,7 +210,7 @@ static irqreturn_t gatwick_action(int cpl, void *dev_id)
210 int irq, bits; 210 int irq, bits;
211 int rc = IRQ_NONE; 211 int rc = IRQ_NONE;
212 212
213 spin_lock_irqsave(&pmac_pic_lock, flags); 213 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
214 for (irq = max_irqs; (irq -= 32) >= max_real_irqs; ) { 214 for (irq = max_irqs; (irq -= 32) >= max_real_irqs; ) {
215 int i = irq >> 5; 215 int i = irq >> 5;
216 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i]; 216 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i];
@@ -220,12 +220,12 @@ static irqreturn_t gatwick_action(int cpl, void *dev_id)
220 if (bits == 0) 220 if (bits == 0)
221 continue; 221 continue;
222 irq += __ilog2(bits); 222 irq += __ilog2(bits);
223 spin_unlock_irqrestore(&pmac_pic_lock, flags); 223 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
224 generic_handle_irq(irq); 224 generic_handle_irq(irq);
225 spin_lock_irqsave(&pmac_pic_lock, flags); 225 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
226 rc = IRQ_HANDLED; 226 rc = IRQ_HANDLED;
227 } 227 }
228 spin_unlock_irqrestore(&pmac_pic_lock, flags); 228 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
229 return rc; 229 return rc;
230} 230}
231 231
@@ -244,7 +244,7 @@ static unsigned int pmac_pic_get_irq(void)
244 return NO_IRQ_IGNORE; /* ignore, already handled */ 244 return NO_IRQ_IGNORE; /* ignore, already handled */
245 } 245 }
246#endif /* CONFIG_SMP */ 246#endif /* CONFIG_SMP */
247 spin_lock_irqsave(&pmac_pic_lock, flags); 247 raw_spin_lock_irqsave(&pmac_pic_lock, flags);
248 for (irq = max_real_irqs; (irq -= 32) >= 0; ) { 248 for (irq = max_real_irqs; (irq -= 32) >= 0; ) {
249 int i = irq >> 5; 249 int i = irq >> 5;
250 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i]; 250 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i];
@@ -256,7 +256,7 @@ static unsigned int pmac_pic_get_irq(void)
256 irq += __ilog2(bits); 256 irq += __ilog2(bits);
257 break; 257 break;
258 } 258 }
259 spin_unlock_irqrestore(&pmac_pic_lock, flags); 259 raw_spin_unlock_irqrestore(&pmac_pic_lock, flags);
260 if (unlikely(irq < 0)) 260 if (unlikely(irq < 0))
261 return NO_IRQ; 261 return NO_IRQ;
262 return irq_linear_revmap(pmac_pic_host, irq); 262 return irq_linear_revmap(pmac_pic_host, irq);