From: Yi Li <yi.li@analog.com>
Date: Wed, 30 Dec 2009 04:04:07 +0000 (+0000)
Subject: Blackfin: simplify SMP handling in SRAM code
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=54536c5c6a807d0db7252c3b33638b88f34650ff;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Blackfin: simplify SMP handling in SRAM code

There is no need to use {get,put}_cpu() when we already have a spinlock to
protect against multiple processors running simultaneously.

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/arch/blackfin/mm/sram-alloc.c b/arch/blackfin/mm/sram-alloc.c
index f068c11ea98f..5732da25ee2d 100644
--- a/arch/blackfin/mm/sram-alloc.c
+++ b/arch/blackfin/mm/sram-alloc.c
@@ -402,7 +402,7 @@ void *l1_data_A_sram_alloc(size_t size)
 	void *addr;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
 
@@ -411,7 +411,6 @@ void *l1_data_A_sram_alloc(size_t size)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-	put_cpu();
 
 	pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n",
 		 (long unsigned int)addr, size);
@@ -430,7 +429,7 @@ int l1_data_A_sram_free(const void *addr)
 	int ret;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
 
@@ -439,7 +438,6 @@ int l1_data_A_sram_free(const void *addr)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-	put_cpu();
 
 	return ret;
 #else
@@ -455,7 +453,7 @@ void *l1_data_B_sram_alloc(size_t size)
 	void *addr;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
 
@@ -464,7 +462,6 @@ void *l1_data_B_sram_alloc(size_t size)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-	put_cpu();
 
 	pr_debug("Allocated address in l1_data_B_sram_alloc is 0x%lx+0x%lx\n",
 		 (long unsigned int)addr, size);
@@ -483,7 +480,7 @@ int l1_data_B_sram_free(const void *addr)
 	int ret;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
 
@@ -492,7 +489,6 @@ int l1_data_B_sram_free(const void *addr)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-	put_cpu();
 
 	return ret;
 #else
@@ -540,7 +536,7 @@ void *l1_inst_sram_alloc(size_t size)
 	void *addr;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
 
@@ -549,7 +545,6 @@ void *l1_inst_sram_alloc(size_t size)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
-	put_cpu();
 
 	pr_debug("Allocated address in l1_inst_sram_alloc is 0x%lx+0x%lx\n",
 		 (long unsigned int)addr, size);
@@ -568,7 +563,7 @@ int l1_inst_sram_free(const void *addr)
 	int ret;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
 
@@ -577,7 +572,6 @@ int l1_inst_sram_free(const void *addr)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
-	put_cpu();
 
 	return ret;
 #else
@@ -593,7 +587,7 @@ void *l1sram_alloc(size_t size)
 	void *addr;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
 
@@ -602,7 +596,6 @@ void *l1sram_alloc(size_t size)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
-	put_cpu();
 
 	return addr;
 }
@@ -614,7 +607,7 @@ void *l1sram_alloc_max(size_t *psize)
 	void *addr;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
 
@@ -623,7 +616,6 @@ void *l1sram_alloc_max(size_t *psize)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
-	put_cpu();
 
 	return addr;
 }
@@ -635,7 +627,7 @@ int l1sram_free(const void *addr)
 	int ret;
 	unsigned int cpu;
 
-	cpu = get_cpu();
+	cpu = smp_processor_id();
 	/* add mutex operation */
 	spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
 
@@ -644,7 +636,6 @@ int l1sram_free(const void *addr)
 
 	/* add mutex operation */
 	spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
-	put_cpu();
 
 	return ret;
 }