linux-kernel - [PATCH 3/7] pstore: Warn for the case of PSTORE_TYPE

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Date:   Thu, 20 Oct 2016 00:17:48 -0700
From:   Joel Fernandes <joelaf@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>,
        Joel Fernandes <joelaf@...gle.com>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>
Subject: [PATCH 3/7] pstore: Warn for the case of PSTORE_TYPE_PMSG write using deprecated function

PMSG now uses ramoops_pstore_write_buf_user instead of ramoops_pstore_write_buf
Print a ratelimited warning if the ramoops_pstore_write_buf is called.

Signed-off-by: Joel Fernandes <joelaf@...gle.com>
---
 fs/pstore/ram.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index cb07ef6..9104ae9 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -288,10 +288,8 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
 		persistent_ram_write(cxt->fprz, buf, size, RAM_LOCK);
 		return 0;
 	} else if (type == PSTORE_TYPE_PMSG) {
-		if (!cxt->mprz)
-			return -ENOMEM;
-		persistent_ram_write(cxt->mprz, buf, size, RAM_LOCK);
-		return 0;
+		pr_warn_ratelimited("ramoops: warning: PMSG shouldn't call %s\n",
+				    __func__);
 	}
 
 	if (type != PSTORE_TYPE_DMESG)
-- 
2.7.4