[PATCH 4.10 92/93] pstore: Fix flags to enable dumps on powerpc

From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.10 92/93] pstore: Fix flags to enable dumps on powerpc
Date	2017-05-18 13:40 +0200
Message-ID	<tIrWH-1NJ-43@gated-at.bofh.it> (permalink)
References	<tIrjX-1e5-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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4.10-stable review patch.  If anyone has any objections, please let me know.

------------------

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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[PATCH 4.10 92/93] pstore: Fix flags to enable dumps on powerpc Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-18 13:40 +0200

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