| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.10 92/93] pstore: Fix flags to enable dumps on powerpc | Date | Thu, 18 May 2017 12:48:01 +0200 |
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4.10-stable review patch. If anyone has any objections, please let me know.
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From: Ankit Kumar <ankit@linux.vnet.ibm.com>
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@linux.vnet.ibm.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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,
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