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Date: Tue, 28 Feb 2017 10:05:31 -0800
From: James Smart <james.smart@...adcom.com>
To: Arnd Bergmann <arnd@...db.de>,
Dick Kennedy <dick.kennedy@...adcom.com>,
"James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>
Cc: Hannes Reinecke <hare@...e.com>,
Johannes Thumshirn <jthumshirn@...e.de>,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: lpfc: use div_u64 for 64-bit division
Arnd,
Thank you. Looks good.
-- james
Signed-off-by: James Smart <james.smart@...adcom.com>
On 2/27/2017 12:31 PM, Arnd Bergmann wrote:
> The new debugfs output causes a link error on 32-bit architectures:
>
> ERROR: "__aeabi_uldivmod" [drivers/scsi/lpfc/lpfc.ko] undefined!
>
> This code is not performance critical, so we can simply use div_u64().
>
> Fixes: bd2cdd5e400f ("scsi: lpfc: NVME Initiator: Add debugfs support")
> Fixes: 2b65e18202fd ("scsi: lpfc: NVME Target: Add debugfs support")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> drivers/scsi/lpfc/lpfc_debugfs.c | 64 ++++++++++++++++++++--------------------
> 1 file changed, 32 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
> index 599fde4ea8b1..47c67bf0514e 100644
> --- a/drivers/scsi/lpfc/lpfc_debugfs.c
> +++ b/drivers/scsi/lpfc/lpfc_debugfs.c
> @@ -873,8 +873,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> len += snprintf(
> buf + len, PAGE_SIZE - len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg1_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg1_total,
> + phba->ktime_data_samples),
> phba->ktime_seg1_min,
> phba->ktime_seg1_max);
> len += snprintf(
> @@ -884,8 +884,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> len += snprintf(
> buf + len, PAGE_SIZE - len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg2_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg2_total,
> + phba->ktime_data_samples),
> phba->ktime_seg2_min,
> phba->ktime_seg2_max);
> len += snprintf(
> @@ -895,8 +895,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> len += snprintf(
> buf + len, PAGE_SIZE - len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg3_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg3_total,
> + phba->ktime_data_samples),
> phba->ktime_seg3_min,
> phba->ktime_seg3_max);
> len += snprintf(
> @@ -906,17 +906,17 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> len += snprintf(
> buf + len, PAGE_SIZE - len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg4_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg4_total,
> + phba->ktime_data_samples),
> phba->ktime_seg4_min,
> phba->ktime_seg4_max);
> len += snprintf(
> buf + len, PAGE_SIZE - len,
> "Total IO avg time: %08lld\n",
> - ((phba->ktime_seg1_total +
> + div_u64(phba->ktime_seg1_total +
> phba->ktime_seg2_total +
> phba->ktime_seg3_total +
> - phba->ktime_seg4_total) /
> + phba->ktime_seg4_total,
> phba->ktime_data_samples));
> return len;
> }
> @@ -935,8 +935,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "cmd pass to NVME Layer\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg1_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg1_total,
> + phba->ktime_data_samples),
> phba->ktime_seg1_min,
> phba->ktime_seg1_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -944,8 +944,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "-to- Driver rcv cmd OP (action)\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg2_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg2_total,
> + phba->ktime_data_samples),
> phba->ktime_seg2_min,
> phba->ktime_seg2_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -953,8 +953,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "Firmware WQ doorbell: cmd\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg3_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg3_total,
> + phba->ktime_data_samples),
> phba->ktime_seg3_min,
> phba->ktime_seg3_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -962,8 +962,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "-to- MSI-X ISR for cmd cmpl\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg4_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg4_total,
> + phba->ktime_data_samples),
> phba->ktime_seg4_min,
> phba->ktime_seg4_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -971,8 +971,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "-to- NVME layer passed cmd done\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg5_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg5_total,
> + phba->ktime_data_samples),
> phba->ktime_seg5_min,
> phba->ktime_seg5_max);
>
> @@ -983,8 +983,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld "
> "max %08lld\n",
> - phba->ktime_seg10_total /
> - phba->ktime_data_samples,
> + div_u64(phba->ktime_seg10_total,
> + phba->ktime_data_samples),
> phba->ktime_seg10_min,
> phba->ktime_seg10_max);
> return len;
> @@ -995,8 +995,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "-to- Driver rcv rsp status OP\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg6_total /
> - phba->ktime_status_samples,
> + div_u64(phba->ktime_seg6_total,
> + phba->ktime_status_samples),
> phba->ktime_seg6_min,
> phba->ktime_seg6_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -1004,8 +1004,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "-to- Firmware WQ doorbell: status\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg7_total /
> - phba->ktime_status_samples,
> + div_u64(phba->ktime_seg7_total,
> + phba->ktime_status_samples),
> phba->ktime_seg7_min,
> phba->ktime_seg7_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -1013,8 +1013,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> " -to- MSI-X ISR for status cmpl\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg8_total /
> - phba->ktime_status_samples,
> + div_u64(phba->ktime_seg8_total,
> + phba->ktime_status_samples),
> phba->ktime_seg8_min,
> phba->ktime_seg8_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -1022,8 +1022,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "-to- NVME layer passed status done\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg9_total /
> - phba->ktime_status_samples,
> + div_u64(phba->ktime_seg9_total,
> + phba->ktime_status_samples),
> phba->ktime_seg9_min,
> phba->ktime_seg9_max);
> len += snprintf(buf + len, PAGE_SIZE-len,
> @@ -1031,8 +1031,8 @@ lpfc_debugfs_nvmektime_data(struct lpfc_vport *vport, char *buf, int size)
> "cmd completed on wire\n");
> len += snprintf(buf + len, PAGE_SIZE-len,
> "avg:%08lld min:%08lld max %08lld\n",
> - phba->ktime_seg10_total /
> - phba->ktime_status_samples,
> + div_u64(phba->ktime_seg10_total,
> + phba->ktime_status_samples),
> phba->ktime_seg10_min,
> phba->ktime_seg10_max);
> return len;
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