linux-kernel - [PATCH next v3 1/8] printk: ringbuffer: rename DESC_COMMITTED

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Message-Id: <20200831011058.6286-2-john.ogness@linutronix.de>
Date:   Mon, 31 Aug 2020 03:16:51 +0206
From:   John Ogness <john.ogness@...utronix.de>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrea Parri <parri.andrea@...il.com>,
        Paul McKenney <paulmck@...nel.org>, kexec@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH next v3 1/8] printk: ringbuffer: rename DESC_COMMITTED_MASK flag

An upcoming ringbuffer support for continuous lines will allow to
reopen records with DESC_COMMITTED_MASK set. As a result, the flag
will no longer describe the final committed state. Rename it to
DESC_COMMIT_MASK as a preparation step.

Signed-off-by: John Ogness <john.ogness@...utronix.de>
Reviewed-by: Petr Mladek <pmladek@...e.com>
---
 kernel/printk/printk_ringbuffer.c | 8 ++++----
 kernel/printk/printk_ringbuffer.h | 6 +++---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/kernel/printk/printk_ringbuffer.c b/kernel/printk/printk_ringbuffer.c
index 0659b50872b5..76248c82d557 100644
--- a/kernel/printk/printk_ringbuffer.c
+++ b/kernel/printk/printk_ringbuffer.c
@@ -361,7 +361,7 @@ static enum desc_state get_desc_state(unsigned long id,
 	if (state_val & DESC_REUSE_MASK)
 		return desc_reusable;
 
-	if (state_val & DESC_COMMITTED_MASK)
+	if (state_val & DESC_COMMIT_MASK)
 		return desc_committed;
 
 	return desc_reserved;
@@ -462,7 +462,7 @@ static enum desc_state desc_read(struct prb_desc_ring *desc_ring,
 static void desc_make_reusable(struct prb_desc_ring *desc_ring,
 			       unsigned long id)
 {
-	unsigned long val_committed = id | DESC_COMMITTED_MASK;
+	unsigned long val_committed = id | DESC_COMMIT_MASK;
 	unsigned long val_reusable = val_committed | DESC_REUSE_MASK;
 	struct prb_desc *desc = to_desc(desc_ring, id);
 	atomic_long_t *state_var = &desc->state_var;
@@ -899,7 +899,7 @@ static bool desc_reserve(struct printk_ringbuffer *rb, unsigned long *id_out)
 	 */
 	prev_state_val = atomic_long_read(&desc->state_var); /* LMM(desc_reserve:E) */
 	if (prev_state_val &&
-	    prev_state_val != (id_prev_wrap | DESC_COMMITTED_MASK | DESC_REUSE_MASK)) {
+	    prev_state_val != (id_prev_wrap | DESC_COMMIT_MASK | DESC_REUSE_MASK)) {
 		WARN_ON_ONCE(1);
 		return false;
 	}
@@ -1184,7 +1184,7 @@ void prb_commit(struct prb_reserved_entry *e)
 	 * this. This pairs with desc_read:B.
 	 */
 	if (!atomic_long_try_cmpxchg(&d->state_var, &prev_state_val,
-				     e->id | DESC_COMMITTED_MASK)) { /* LMM(prb_commit:B) */
+				     e->id | DESC_COMMIT_MASK)) { /* LMM(prb_commit:B) */
 		WARN_ON_ONCE(1);
 	}
 
diff --git a/kernel/printk/printk_ringbuffer.h b/kernel/printk/printk_ringbuffer.h
index e6302da041f9..dcda5e9b4676 100644
--- a/kernel/printk/printk_ringbuffer.h
+++ b/kernel/printk/printk_ringbuffer.h
@@ -115,9 +115,9 @@ struct prb_reserved_entry {
 #define _DATA_SIZE(sz_bits)		(1UL << (sz_bits))
 #define _DESCS_COUNT(ct_bits)		(1U << (ct_bits))
 #define DESC_SV_BITS			(sizeof(unsigned long) * 8)
-#define DESC_COMMITTED_MASK		(1UL << (DESC_SV_BITS - 1))
+#define DESC_COMMIT_MASK		(1UL << (DESC_SV_BITS - 1))
 #define DESC_REUSE_MASK			(1UL << (DESC_SV_BITS - 2))
-#define DESC_FLAGS_MASK			(DESC_COMMITTED_MASK | DESC_REUSE_MASK)
+#define DESC_FLAGS_MASK			(DESC_COMMIT_MASK | DESC_REUSE_MASK)
 #define DESC_ID_MASK			(~DESC_FLAGS_MASK)
 #define DESC_ID(sv)			((sv) & DESC_ID_MASK)
 #define FAILED_LPOS			0x1
@@ -213,7 +213,7 @@ struct prb_reserved_entry {
  */
 #define BLK0_LPOS(sz_bits)	(-(_DATA_SIZE(sz_bits)))
 #define DESC0_ID(ct_bits)	DESC_ID(-(_DESCS_COUNT(ct_bits) + 1))
-#define DESC0_SV(ct_bits)	(DESC_COMMITTED_MASK | DESC_REUSE_MASK | DESC0_ID(ct_bits))
+#define DESC0_SV(ct_bits)	(DESC_COMMIT_MASK | DESC_REUSE_MASK | DESC0_ID(ct_bits))
 
 /*
  * Define a ringbuffer with an external text data buffer. The same as
-- 
2.20.1