powerpc/nvram: use kmemdup rather than duplicating its implementation

The patch was generated using fixed coccinelle semantic patch
scripts/coccinelle/api/memdup.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2014320

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 1e703f8ebad4e35d8888eed535c71b492e8af87d..6f6597b3966b0abf60465d1ac2249979a18b4956 100644 (file)
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -541,10 +541,9 @@ static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type,
                        time->tv_sec = be64_to_cpu(oops_hdr->timestamp);
                        time->tv_nsec = 0;
                }
-               *buf = kmalloc(length, GFP_KERNEL);
+               *buf = kmemdup(buff + hdr_size, length, GFP_KERNEL);
                if (*buf == NULL)
                        return -ENOMEM;
-               memcpy(*buf, buff + hdr_size, length);
                kfree(buff);
 
                if (err_type == ERR_TYPE_KERNEL_PANIC_GZ)