4.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ankit Kumar <ankit@xxxxxxxxxxxxxxxxxx> commit 041939c1ec54208b42f5cd819209173d52a29d34 upstream. After commit c950fd6f201a kernel registers pstore write based on flag set. Pstore write for powerpc is broken as flags(PSTORE_FLAGS_DMESG) is not set for powerpc architecture. On panic, kernel doesn't write message to /fs/pstore/dmesg*(Entry doesn't gets created at all). This patch enables pstore write for powerpc architecture by setting PSTORE_FLAGS_DMESG flag. Fixes: c950fd6f201a ("pstore: Split pstore fragile flags") Signed-off-by: Ankit Kumar <ankit@xxxxxxxxxxxxxxxxxx> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/powerpc/kernel/nvram_64.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/powerpc/kernel/nvram_64.c +++ b/arch/powerpc/kernel/nvram_64.c @@ -561,6 +561,7 @@ static ssize_t nvram_pstore_read(u64 *id static struct pstore_info nvram_pstore_info = { .owner = THIS_MODULE, .name = "nvram", + .flags = PSTORE_FLAGS_DMESG, .open = nvram_pstore_open, .read = nvram_pstore_read, .write = nvram_pstore_write,