powerpc/nvram: Fix NVRAM partition list setup

Simplify creation and use of the NVRAM partition list.

Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 125d86cf0afc68f1e1689b34cb9bb8e436027791..b8a50fa5875bd0f9b63c86adc154710d3fe635cd 100644 (file)
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -51,7 +51,7 @@ struct nvram_partition {
        unsigned int index;
 };
 
-static struct nvram_partition * nvram_part;
+static LIST_HEAD(nvram_partitions);
 
 static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin)
 {
@@ -196,13 +196,11 @@ static struct miscdevice nvram_dev = {
 #ifdef DEBUG_NVRAM
 static void __init nvram_print_partitions(char * label)
 {
-       struct list_head * p;
        struct nvram_partition * tmp_part;
        
        printk(KERN_WARNING "--------%s---------\n", label);
        printk(KERN_WARNING "indx\t\tsig\tchks\tlen\tname\n");
-       list_for_each(p, &nvram_part->partition) {
-               tmp_part = list_entry(p, struct nvram_partition, partition);
+       list_for_each_entry(tmp_part, &nvram_partitions, partition) {
                printk(KERN_WARNING "%4d    \t%02x\t%02x\t%d\t%s\n",
                       tmp_part->index, tmp_part->header.signature,
                       tmp_part->header.checksum, tmp_part->header.length,
@@ -250,7 +248,7 @@ int __init nvram_remove_partition(const char *name, int sig)
        struct nvram_partition *part, *prev, *tmp;
        int rc;
 
-       list_for_each_entry(part, &nvram_part->partition, partition) {
+       list_for_each_entry(part, &nvram_partitions, partition) {
                if (part->header.signature != sig)
                        continue;
                if (name && strncmp(name, part->header.name, 12))
@@ -269,7 +267,7 @@ int __init nvram_remove_partition(const char *name, int sig)
 
        /* Merge contiguous ones */
        prev = NULL;
-       list_for_each_entry_safe(part, tmp, &nvram_part->partition, partition) {
+       list_for_each_entry_safe(part, tmp, &nvram_partitions, partition) {
                if (part->header.signature != NVRAM_SIG_FREE) {
                        prev = NULL;
                        continue;
@@ -333,7 +331,7 @@ loff_t __init nvram_create_partition(const char *name, int sig,
 
        /* Find a free partition that will give us the maximum needed size 
           If can't find one that will give us the minimum size needed */
-       list_for_each_entry(part, &nvram_part->partition, partition) {
+       list_for_each_entry(part, &nvram_partitions, partition) {
                if (part->header.signature != NVRAM_SIG_FREE)
                        continue;
 
@@ -412,7 +410,7 @@ int nvram_get_partition_size(loff_t data_index)
 {
        struct nvram_partition *part;
        
-       list_for_each_entry(part, &nvram_part->partition, partition) {
+       list_for_each_entry(part, &nvram_partitions, partition) {
                if (part->index + NVRAM_HEADER_LEN == data_index)
                        return (part->header.length - 1) * NVRAM_BLOCK_LEN;
        }
@@ -430,7 +428,7 @@ loff_t nvram_find_partition(const char *name, int sig, int *out_size)
 {
        struct nvram_partition *p;
 
-       list_for_each_entry(p, &nvram_part->partition, partition) {
+       list_for_each_entry(p, &nvram_partitions, partition) {
                if (p->header.signature == sig &&
                    (!name || !strncmp(p->header.name, name, 12))) {
                        if (out_size)
@@ -452,14 +450,6 @@ int __init nvram_scan_partitions(void)
        int total_size;
        int err;
 
-       /* Initialize our anchor for the nvram partition list */
-       nvram_part = kmalloc(sizeof(struct nvram_partition), GFP_KERNEL);
-       if (!nvram_part) {
-               printk(KERN_ERR "nvram_init: Failed kmalloc\n");
-               return -ENOMEM;
-       }
-       INIT_LIST_HEAD(&nvram_part->partition);
-  
        if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0)
                return -ENODEV;
        total_size = ppc_md.nvram_size();
@@ -507,7 +497,7 @@ int __init nvram_scan_partitions(void)
                
                memcpy(&tmp_part->header, &phead, NVRAM_HEADER_LEN);
                tmp_part->index = cur_index;
-               list_add_tail(&tmp_part->partition, &nvram_part->partition);
+               list_add_tail(&tmp_part->partition, &nvram_partitions);
                
                cur_index += phead.length * NVRAM_BLOCK_LEN;
        }