linux-kernel - [RFC 3/6] pstore: remove max argument from ramoops_get_next

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Date:   Fri, 26 Oct 2018 11:00:39 -0700
From:   "Joel Fernandes (Google)" <joel@...lfernandes.org>
To:     linux-kernel@...r.kernel.org
Cc:     kernel-team@...roid.com,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Kees Cook <keescook@...omium.org>,
        Tony Luck <tony.luck@...el.com>
Subject: [RFC 3/6] pstore: remove max argument from ramoops_get_next_prz

>From the code flow, the 'max' checks are already being done on the prz
passed to ramoops_get_next_prz. Lets remove it to simplify this function
and reduce its arguments.

Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
---
 fs/pstore/ram.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index cbfdf4b8e89d..3055e05acab1 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -124,14 +124,14 @@ static int ramoops_pstore_open(struct pstore_info *psi)
 }
 
 static struct persistent_ram_zone *
-ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
+ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c,
 		     u64 *id, enum pstore_type_id *typep, bool update)
 {
 	struct persistent_ram_zone *prz;
 	int i = (*c)++;
 
 	/* Give up if we never existed or have hit the end. */
-	if (!przs || i >= max)
+	if (!przs)
 		return NULL;
 
 	prz = przs[i];
@@ -254,8 +254,7 @@ static ssize_t ramoops_pstore_read(struct pstore_record *record)
 	/* Find the next valid persistent_ram_zone for DMESG */
 	while (cxt->dump_read_cnt < cxt->max_dump_cnt && !prz) {
 		prz = ramoops_get_next_prz(cxt->dprzs, &cxt->dump_read_cnt,
-					   cxt->max_dump_cnt, &record->id,
-					   &record->type, 1);
+					   &record->id, &record->type, 1);
 		if (!prz_ok(prz))
 			continue;
 		header_length = ramoops_read_kmsg_hdr(persistent_ram_old(prz),
@@ -271,17 +270,17 @@ static ssize_t ramoops_pstore_read(struct pstore_record *record)
 
 	if (!prz_ok(prz))
 		prz = ramoops_get_next_prz(&cxt->cprz, &cxt->console_read_cnt,
-					   1, &record->id, &record->type, 0);
+					   &record->id, &record->type, 0);
 
 	if (!prz_ok(prz))
 		prz = ramoops_get_next_prz(&cxt->mprz, &cxt->pmsg_read_cnt,
-					   1, &record->id, &record->type, 0);
+					   &record->id, &record->type, 0);
 
 	/* ftrace is last since it may want to dynamically allocate memory. */
 	if (!prz_ok(prz)) {
 		if (!(cxt->flags & RAMOOPS_FLAG_FTRACE_PER_CPU)) {
 			prz = ramoops_get_next_prz(cxt->fprzs,
-					&cxt->ftrace_read_cnt, 1, &record->id,
+					&cxt->ftrace_read_cnt, &record->id,
 					&record->type, 0);
 		} else {
 			/*
@@ -299,7 +298,6 @@ static ssize_t ramoops_pstore_read(struct pstore_record *record)
 			while (cxt->ftrace_read_cnt < cxt->max_ftrace_cnt) {
 				prz_next = ramoops_get_next_prz(cxt->fprzs,
 						&cxt->ftrace_read_cnt,
-						cxt->max_ftrace_cnt,
 						&record->id,
 						&record->type, 0);
 
-- 
2.19.1.568.g152ad8e336-goog