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Commit 81c969a8 authored by Mike Frysinger's avatar Mike Frysinger
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Blackfin: push SRAM locks down into related ifdefs 



Rather than defining the locks and initializing them all the time, only do
so when we actually need them (i.e. the SRAM regions exist).  This avoids
dead data and code bloat during runtime.

Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent 9c954f89

arch/blackfin/mm/sram-alloc.c

+17 −13
Original line number Diff line number Diff line
@@ -42,11 +42,6 @@ 
#include <asm/mem_map.h>

#include "blackfin_sram.h"



static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1sram_lock);

static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_data_sram_lock);

static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_inst_sram_lock);

static spinlock_t l2_sram_lock ____cacheline_aligned_in_smp;



/* the data structure for L1 scratchpad and DATA SRAM */

struct sram_piece {

	void *paddr;
@@ -55,6 +50,7 @@ struct sram_piece { 
	struct sram_piece *next;

};



static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1sram_lock);

static DEFINE_PER_CPU(struct sram_piece, free_l1_ssram_head);

static DEFINE_PER_CPU(struct sram_piece, used_l1_ssram_head);
@@ -68,12 +64,18 @@ static DEFINE_PER_CPU(struct sram_piece, free_l1_data_B_sram_head); 
static DEFINE_PER_CPU(struct sram_piece, used_l1_data_B_sram_head);

#endif



#if L1_DATA_A_LENGTH || L1_DATA_B_LENGTH

static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_data_sram_lock);

#endif



#if L1_CODE_LENGTH != 0

static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_inst_sram_lock);

static DEFINE_PER_CPU(struct sram_piece, free_l1_inst_sram_head);

static DEFINE_PER_CPU(struct sram_piece, used_l1_inst_sram_head);

#endif



#if L2_LENGTH != 0

static spinlock_t l2_sram_lock ____cacheline_aligned_in_smp;

static struct sram_piece free_l2_sram_head, used_l2_sram_head;

#endif
@@ -225,10 +227,10 @@ static void __init l2_sram_init(void) 
	printk(KERN_INFO "Blackfin L2 SRAM: %d KB (%d KB free)\n",

		L2_LENGTH >> 10,

		free_l2_sram_head.next->size >> 10);

#endif



	/* mutex initialize */

	spin_lock_init(&l2_sram_lock);

#endif

}



static int __init bfin_sram_init(void)
@@ -416,18 +418,17 @@ EXPORT_SYMBOL(sram_free); 


void *l1_data_A_sram_alloc(size_t size)

{

#if L1_DATA_A_LENGTH != 0

	unsigned long flags;

	void *addr = NULL;

	void *addr;

	unsigned int cpu;



	cpu = get_cpu();

	/* add mutex operation */

	spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);



#if L1_DATA_A_LENGTH != 0

	addr = _sram_alloc(size, &per_cpu(free_l1_data_A_sram_head, cpu),

			&per_cpu(used_l1_data_A_sram_head, cpu));

#endif



	/* add mutex operation */

	spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
@@ -437,11 +438,15 @@ void *l1_data_A_sram_alloc(size_t size) 
		 (long unsigned int)addr, size);



	return addr;

#else

	return NULL;

#endif

}

EXPORT_SYMBOL(l1_data_A_sram_alloc);



int l1_data_A_sram_free(const void *addr)

{

#if L1_DATA_A_LENGTH != 0

	unsigned long flags;

	int ret;

	unsigned int cpu;
@@ -450,18 +455,17 @@ int l1_data_A_sram_free(const void *addr) 
	/* add mutex operation */

	spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);



#if L1_DATA_A_LENGTH != 0

	ret = _sram_free(addr, &per_cpu(free_l1_data_A_sram_head, cpu),

			&per_cpu(used_l1_data_A_sram_head, cpu));

#else

	ret = -1;

#endif



	/* add mutex operation */

	spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);

	put_cpu();



	return ret;

#else

	return -1;

#endif

}

EXPORT_SYMBOL(l1_data_A_sram_free);