diff options
Diffstat (limited to 'fs/pstore/ram_core.c')
| -rw-r--r-- | fs/pstore/ram_core.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c index 4dabbb8e4270..eecd2a8a84dd 100644 --- a/fs/pstore/ram_core.c +++ b/fs/pstore/ram_core.c @@ -391,7 +391,7 @@ static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, } static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, - int ecc_size) + u32 sig, int ecc_size) { int ret; @@ -399,7 +399,9 @@ static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, if (ret) return ret; - if (prz->buffer->sig == PERSISTENT_RAM_SIG) { + sig ^= PERSISTENT_RAM_SIG; + + if (prz->buffer->sig == sig) { if (buffer_size(prz) > prz->buffer_size || buffer_start(prz) > buffer_size(prz)) pr_info("persistent_ram: found existing invalid buffer," @@ -417,7 +419,7 @@ static int __devinit persistent_ram_post_init(struct persistent_ram_zone *prz, " (sig = 0x%08x)\n", prz->buffer->sig); } - prz->buffer->sig = PERSISTENT_RAM_SIG; + prz->buffer->sig = sig; persistent_ram_zap(prz); return 0; @@ -442,7 +444,7 @@ void persistent_ram_free(struct persistent_ram_zone *prz) } struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, - size_t size, + size_t size, u32 sig, int ecc_size) { struct persistent_ram_zone *prz; @@ -458,7 +460,7 @@ struct persistent_ram_zone * __devinit persistent_ram_new(phys_addr_t start, if (ret) goto err; - ret = persistent_ram_post_init(prz, ecc_size); + ret = persistent_ram_post_init(prz, sig, ecc_size); if (ret) goto err; |