From 0eed84ffb094bbddfb4b9378ef0a2eccf4dda99c Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Thu, 1 Nov 2018 14:03:07 -0700
Subject: [PATCH] pstore: Improve and update some comments and status output
This improves and updates some comments:
- dump handler comment out of sync from calling convention
- fix kern-doc typo
and improves status output:
- reminder that only kernel crash dumps are compressed
- do not be silent about ECC infrastructure failures
Signed-off-by: Kees Cook <keescook@chromium.org>
---
fs/pstore/platform.c | 7 +++----
fs/pstore/ram_core.c | 4 +++-
include/linux/pstore.h | 2 +-
3 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index a75756c48e10b..32340e7dd6a50 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -304,7 +304,7 @@ static void allocate_buf_for_compression(void)
big_oops_buf_sz = size;
big_oops_buf = buf;
- pr_info("Using compression: %s\n", zbackend->name);
+ pr_info("Using crash dump compression: %s\n", zbackend->name);
}
static void free_buf_for_compression(void)
@@ -354,9 +354,8 @@ void pstore_record_init(struct pstore_record *record,
}
/*
- * callback from kmsg_dump. (s2,l2) has the most recently
- * written bytes, older bytes are in (s1,l1). Save as much
- * as we can from the end of the buffer.
+ * callback from kmsg_dump. Save as much as we can (up to kmsg_bytes) from the
+ * end of the buffer.
*/
static void pstore_dump(struct kmsg_dumper *dumper,
enum kmsg_dump_reason reason)
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index 3e9e3ba4fb07a..e6375439c5aca 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -503,8 +503,10 @@ static int persistent_ram_post_init(struct persistent_ram_zone *prz, u32 sig,
bool zap = !!(prz->flags & PRZ_FLAG_ZAP_OLD);
ret = persistent_ram_init_ecc(prz, ecc_info);
- if (ret)
+ if (ret) {
+ pr_warn("ECC failed %s\n", prz->label);
return ret;
+ }
sig ^= PERSISTENT_RAM_SIG;
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index 30fcec375a3af..81669aa800274 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -85,7 +85,7 @@ struct pstore_record {
/**
* struct pstore_info - backend pstore driver structure
*
- * @owner: module which is repsonsible for this backend driver
+ * @owner: module which is responsible for this backend driver
* @name: name of the backend driver
*
* @buf_lock: spinlock to serialize access to @buf
--
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