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Date: Thu, 8 Dec 2016 10:06:02 +1100 (AEDT)
From: Finn Thain <fthain@...egraphics.com.au>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
cc: Greg Ungerer <gerg@...ux-m68k.org>, Sam Creasey <sammy@...my.net>,
Joshua Thompson <funaho@...ai.org>,
linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/22] m68k/mac: iop - Modernize printing of kernel
messages
On Wed, 7 Dec 2016, Geert Uytterhoeven wrote:
> - Introduce helpers for printing debug messages, incl. dummies for
> validating format strings when debugging is disabled,
> - Convert from printk() to pr_*(),
> - Add missing continuations,
> - Drop superfluous casts.
>
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> ---
> arch/m68k/mac/iop.c | 69 ++++++++++++++++++++++-------------------------------
> 1 file changed, 29 insertions(+), 40 deletions(-)
>
> diff --git a/arch/m68k/mac/iop.c b/arch/m68k/mac/iop.c
> index 7990b6f50105b19b..bbfeded6b270f950 100644
> --- a/arch/m68k/mac/iop.c
> +++ b/arch/m68k/mac/iop.c
> @@ -116,6 +116,13 @@
> #include <asm/mac_iop.h>
>
> /*#define DEBUG_IOP*/
> +#ifdef DEBUG_IOP
We can use #if 0 here, since the macro can be avoided later...
> +#define pr_iop(fmt, ...) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
> +#define pr_iop_cont(fmt, ...) pr_cont(fmt, ##__VA_ARGS__)
> +#else
> +#define pr_iop(fmt, ...) no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
> +#define pr_iop_cont(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
> +#endif
>
> /* Non-zero if the IOPs are present */
>
> @@ -268,10 +275,10 @@ void __init iop_init(void)
> int i;
>
> if (iop_scc_present) {
> - printk("IOP: detected SCC IOP at %p\n", iop_base[IOP_NUM_SCC]);
> + pr_info("IOP: detected SCC IOP at %p\n", iop_base[IOP_NUM_SCC]);
> }
> if (iop_ism_present) {
> - printk("IOP: detected ISM IOP at %p\n", iop_base[IOP_NUM_ISM]);
> + pr_info("IOP: detected ISM IOP at %p\n", iop_base[IOP_NUM_ISM]);
> iop_start(iop_base[IOP_NUM_ISM]);
> iop_alive(iop_base[IOP_NUM_ISM]); /* clears the alive flag */
> }
> @@ -310,9 +317,9 @@ void __init iop_register_interrupts(void)
> pr_err("Couldn't register ISM IOP interrupt\n");
> }
> if (!iop_alive(iop_base[IOP_NUM_ISM])) {
> - printk("IOP: oh my god, they killed the ISM IOP!\n");
> + pr_warn("IOP: oh my god, they killed the ISM IOP!\n");
> } else {
> - printk("IOP: the ISM IOP seems to be alive.\n");
> + pr_info("IOP: the ISM IOP seems to be alive.\n");
> }
> }
> }
> @@ -349,9 +356,8 @@ void iop_complete_message(struct iop_msg *msg)
> int chan = msg->channel;
> int i,offset;
>
> -#ifdef DEBUG_IOP
> - printk("iop_complete(%p): iop %d chan %d\n", msg, msg->iop_num, msg->channel);
> -#endif
> + pr_iop("iop_complete(%p): iop %d chan %d\n", msg, msg->iop_num,
> + msg->channel);
>
> offset = IOP_ADDR_RECV_MSG + (msg->channel * IOP_MSG_LEN);
>
> @@ -397,9 +403,7 @@ static void iop_handle_send(uint iop_num, uint chan)
> struct iop_msg *msg,*msg2;
> int i,offset;
>
> -#ifdef DEBUG_IOP
> - printk("iop_handle_send: iop %d channel %d\n", iop_num, chan);
> -#endif
> + pr_iop("iop_handle_send: iop %d channel %d\n", iop_num, chan);
>
> iop_writeb(iop, IOP_ADDR_SEND_STATE + chan, IOP_MSG_IDLE);
>
> @@ -430,9 +434,7 @@ static void iop_handle_recv(uint iop_num, uint chan)
> int i,offset;
> struct iop_msg *msg;
>
> -#ifdef DEBUG_IOP
> - printk("iop_handle_recv: iop %d channel %d\n", iop_num, chan);
> -#endif
> + pr_iop("iop_handle_recv: iop %d channel %d\n", iop_num, chan);
>
> msg = iop_alloc_msg();
> msg->iop_num = iop_num;
> @@ -454,13 +456,14 @@ static void iop_handle_recv(uint iop_num, uint chan)
> if (msg->handler) {
> (*msg->handler)(msg);
> } else {
> + pr_iop("iop_handle_recv: unclaimed message on iop %d channel %d\n",
> + iop_num, chan);
> #ifdef DEBUG_IOP
> - printk("iop_handle_recv: unclaimed message on iop %d channel %d\n", iop_num, chan);
> - printk("iop_handle_recv:");
> + pr_iop("iop_handle_recv:");
> for (i = 0 ; i < IOP_MSG_LEN ; i++) {
> - printk(" %02X", (uint) msg->message[i]);
> + pr_cont(" %02X", msg->message[i]);
> }
> - printk("\n");
> + pr_iop_cont("\n");
> #endif
> iop_complete_message(msg);
> }
I think you can avoid the DEBUG_IOP macro entirely, by using
pr_iop("iop_handle_recv: %*ph\n", IOP_MSG_LEN, msg->message);
Thanks.
> @@ -574,50 +577,36 @@ irqreturn_t iop_ism_irq(int irq, void *dev_id)
> volatile struct mac_iop *iop = iop_base[iop_num];
> int i,state;
>
> -#ifdef DEBUG_IOP
> - printk("iop_ism_irq: status = %02X\n", (uint) iop->status_ctrl);
> -#endif
> + pr_iop("iop_ism_irq: status = %02X\n", iop->status_ctrl);
>
> /* INT0 indicates a state change on an outgoing message channel */
>
> if (iop->status_ctrl & IOP_INT0) {
> iop->status_ctrl = IOP_INT0 | IOP_RUN | IOP_AUTOINC;
> -#ifdef DEBUG_IOP
> - printk("iop_ism_irq: new status = %02X, send states",
> - (uint) iop->status_ctrl);
> -#endif
> + pr_iop("iop_ism_irq: new status = %02X, send states",
> + iop->status_ctrl);
> for (i = 0 ; i < NUM_IOP_CHAN ; i++) {
> state = iop_readb(iop, IOP_ADDR_SEND_STATE + i);
> -#ifdef DEBUG_IOP
> - printk(" %02X", state);
> -#endif
> + pr_iop_cont(" %02X", state);
> if (state == IOP_MSG_COMPLETE) {
> iop_handle_send(iop_num, i);
> }
> }
> -#ifdef DEBUG_IOP
> - printk("\n");
> -#endif
> + pr_iop_cont("\n");
> }
>
> if (iop->status_ctrl & IOP_INT1) { /* INT1 for incoming msgs */
> iop->status_ctrl = IOP_INT1 | IOP_RUN | IOP_AUTOINC;
> -#ifdef DEBUG_IOP
> - printk("iop_ism_irq: new status = %02X, recv states",
> - (uint) iop->status_ctrl);
> -#endif
> + pr_iop("iop_ism_irq: new status = %02X, recv states",
> + iop->status_ctrl);
> for (i = 0 ; i < NUM_IOP_CHAN ; i++) {
> state = iop_readb(iop, IOP_ADDR_RECV_STATE + i);
> -#ifdef DEBUG_IOP
> - printk(" %02X", state);
> -#endif
> + pr_iop_cont(" %02X", state);
> if (state == IOP_MSG_NEW) {
> iop_handle_recv(iop_num, i);
> }
> }
> -#ifdef DEBUG_IOP
> - printk("\n");
> -#endif
> + pr_iop_cont("\n");
> }
> return IRQ_HANDLED;
> }
>
--
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