[PATCH 14/17] i3c: renesas: Organize structures to avoid unnecessary padding

Claudiu Beznea claudiu.beznea at kernel.org
Fri May 22 03:18:12 PDT 2026


From: Claudiu Beznea <claudiu.beznea.uj at bp.renesas.com>

Reorder structure members to reduce padding and improve memory layout.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj at bp.renesas.com>
---
 drivers/i3c/master/renesas-i3c.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/i3c/master/renesas-i3c.c b/drivers/i3c/master/renesas-i3c.c
index 631c9c5d8038..5614ed99553c 100644
--- a/drivers/i3c/master/renesas-i3c.c
+++ b/drivers/i3c/master/renesas-i3c.c
@@ -221,19 +221,19 @@ enum renesas_i3c_event {
 };
 
 struct renesas_i3c_cmd {
+	const void *tx_buf;
+	void *rx_buf;
+	/* i2c xfer */
+	u8 *i2c_buf;
+	const struct i2c_msg *msg;
+	int i2c_bytes_left;
+	int i2c_is_last;
 	u32 cmd0;
 	u32 len;
-	const void *tx_buf;
 	u32 tx_count;
-	void *rx_buf;
 	u32 rx_count;
 	u32 err;
 	u8 rnw;
-	/* i2c xfer */
-	int i2c_bytes_left;
-	int i2c_is_last;
-	u8 *i2c_buf;
-	const struct i2c_msg *msg;
 };
 
 struct renesas_i3c_xfer {
@@ -253,21 +253,21 @@ struct renesas_i3c_xferqueue {
 };
 
 struct renesas_i3c {
+	void __iomem *regs;
+	struct clk_bulk_data *clks;
+	struct reset_control *presetn;
+	struct reset_control *tresetn;
+	struct renesas_i3c_xferqueue xferqueue;
 	struct i3c_master_controller base;
+	unsigned long rate;
 	enum i3c_internal_state internal_state;
-	u16 maxdevs;
 	u32 free_pos;
 	u32 dyn_addr;
 	u32 i2c_STDBR;
 	u32 i3c_STDBR;
 	u32 extbr;
-	unsigned long rate;
+	u16 maxdevs;
 	u8 addrs[RENESAS_I3C_MAX_DEVS];
-	struct renesas_i3c_xferqueue xferqueue;
-	void __iomem *regs;
-	struct clk_bulk_data *clks;
-	struct reset_control *presetn;
-	struct reset_control *tresetn;
 	u8 num_clks;
 	u8 refclk_div;
 };
-- 
2.43.0




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