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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-07-29 18:18:44 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-11-30 15:32:06 +1100 |
| commit | 36673307aee535f951f4eede81049c6962bc4ba9 (patch) | |
| tree | 20f238a8883ba449e9a9634a74d65c0632827794 /arch/powerpc/kernel/nvram_64.c | |
| parent | 4e7c77a385efac81d6677a4a761b1b66cd2cb59e (diff) | |
| download | linux-next-36673307aee535f951f4eede81049c6962bc4ba9.tar.gz | |
powerpc/nvram: nvram_create_partitions() now uses bytes
This converts nvram_create_partition() to use a size in bytes
rather than blocks. It does the appropriate alignment internally
The size passed is also the data size (ie. doesn't include the
header anymore).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/nvram_64.c')
| -rw-r--r-- | arch/powerpc/kernel/nvram_64.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c index 9e133355f742..a5a5587121a7 100644 --- a/arch/powerpc/kernel/nvram_64.c +++ b/arch/powerpc/kernel/nvram_64.c @@ -34,10 +34,10 @@ #undef DEBUG_NVRAM -#define NVRAM_HEADER_LEN 16 /* sizeof(struct nvram_header) */ -#define NVRAM_BLOCK_LEN 16 -#define NVRAM_MAX_REQ (2080/NVRAM_BLOCK_LEN) -#define NVRAM_MIN_REQ (1056/NVRAM_BLOCK_LEN) +#define NVRAM_HEADER_LEN sizeof(struct nvram_header) +#define NVRAM_BLOCK_LEN NVRAM_HEADER_LEN +#define NVRAM_MAX_REQ 2079 +#define NVRAM_MIN_REQ 1055 /* If change this size, then change the size of NVNAME_LEN */ struct nvram_header { @@ -311,7 +311,7 @@ static int __init nvram_remove_os_partition(void) * nvram_create_partition - Create a partition in nvram * @name: name of the partition to create * @sig: signature of the partition to create - * @req_size: size to allocate preferrably + * @req_size: size of data to allocate in bytes * @min_size: minimum acceptable size (0 means req_size) */ static int __init nvram_create_partition(const char *name, int sig, @@ -325,12 +325,20 @@ static int __init nvram_create_partition(const char *name, int sig, long size = 0; int rc; + /* Convert sizes from bytes to blocks */ + req_size = _ALIGN_UP(req_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN; + min_size = _ALIGN_UP(min_size, NVRAM_BLOCK_LEN) / NVRAM_BLOCK_LEN; + /* If no minimum size specified, make it the same as the * requested size */ if (min_size == 0) min_size = req_size; + /* Now add one block to each for the header */ + req_size += 1; + min_size += 1; + /* 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) { @@ -450,7 +458,7 @@ static int __init nvram_setup_partition(void) if (strcmp(part->header.name, "ppc64,linux")) continue; - if (part->header.length >= NVRAM_MIN_REQ) { + if ((part->header.length - 1) * NVRAM_BLOCK_LEN >= NVRAM_MIN_REQ) { /* found our partition */ nvram_error_log_index = part->index + NVRAM_HEADER_LEN; nvram_error_log_size = ((part->header.length - 1) * |