openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Yi Li 2009-12-30 04:04:07 +00:00 committed by Mike Frysinger
parent 0b39db28b9
commit 54536c5c6a
1 changed files with 9 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
arch/blackfin/mm/sram-alloc.c
View File

@ -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;
}