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Commit 071c06cb570d38efe23a124e885f2f3e643a9206

Authored by Thomas Gleixner
Committed by Benjamin Herrenschmidt
1 parent b8f87782e8
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

powerpc: Convert pmc_owner_lock to raw_spinlock 

pmc_owner_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>

Showing 1 changed file with 5 additions and 5 deletions Side-by-side Diff

arch/powerpc/kernel/pmc.c
Diff comments   View file @ 071c06c
... ... @@ -37,7 +37,7 @@
37 37 }
38 38  
39 39  
40   -static DEFINE_SPINLOCK(pmc_owner_lock);
  40 +static DEFINE_RAW_SPINLOCK(pmc_owner_lock);
41 41 static void *pmc_owner_caller; /* mostly for debugging */
42 42 perf_irq_t perf_irq = dummy_perf;
43 43  
... ... @@ -45,7 +45,7 @@
45 45 {
46 46 int err = 0;
47 47  
48   - spin_lock(&pmc_owner_lock);
  48 + raw_spin_lock(&pmc_owner_lock);
49 49  
50 50 if (pmc_owner_caller) {
51 51 printk(KERN_WARNING "reserve_pmc_hardware: "
52 52  
53 53  
... ... @@ -59,21 +59,21 @@
59 59 perf_irq = new_perf_irq ? new_perf_irq : dummy_perf;
60 60  
61 61 out:
62   - spin_unlock(&pmc_owner_lock);
  62 + raw_spin_unlock(&pmc_owner_lock);
63 63 return err;
64 64 }
65 65 EXPORT_SYMBOL_GPL(reserve_pmc_hardware);
66 66  
67 67 void release_pmc_hardware(void)
68 68 {
69   - spin_lock(&pmc_owner_lock);
  69 + raw_spin_lock(&pmc_owner_lock);
70 70  
71 71 WARN_ON(! pmc_owner_caller);
72 72  
73 73 pmc_owner_caller = NULL;
74 74 perf_irq = dummy_perf;
75 75  
76   - spin_unlock(&pmc_owner_lock);
  76 + raw_spin_unlock(&pmc_owner_lock);
77 77 }
78 78 EXPORT_SYMBOL_GPL(release_pmc_hardware);
79 79