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Fri, 3 Jan 2020 06:16:39 +0000 From: Chaitanya Kulkarni To: Balbir Singh , "linux-kernel@vger.kernel.org" , "linux-block@vger.kernel.org" , "linux-nvme@lists.infradead.org" Subject: Re: [resend v1 1/5] block/genhd: Notify udev about capacity change Thread-Topic: [resend v1 1/5] block/genhd: Notify udev about capacity change Thread-Index: AQHVwUG9qzxAaxFzwka5YkVHh6Dxxg== Date: Fri, 3 Jan 2020 06:16:39 +0000 Message-ID: References: <20200102075315.22652-1-sblbir@amazon.com> <20200102075315.22652-2-sblbir@amazon.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Chaitanya.Kulkarni@wdc.com; x-originating-ip: [199.255.45.62] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 266f1800-e0c7-4fa3-7e22-08d790147ed5 x-ms-traffictypediagnostic: BYAPR04MB6088: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:9508; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On 01/01/2020 11:53 PM, Balbir Singh wrote: > Allow block/genhd to notify user space (via udev) about disk size changes > using a new helper disk_set_capacity(), which is a wrapper on top > of set_capacity(). disk_set_capacity() will only notify via udev if > the current capacity or the target capacity is not zero. > > Suggested-by: Christoph Hellwig > Signed-off-by: Someswarudu Sangaraju > Signed-off-by: Balbir Singh > --- Since disk_set_capacity(() is on the same line as set_capacity() we should follow the same convention, which is :- 1. Avoid exporting symbol. 2. Mark new function in-line. Unless there is a very specific reason for breaking the pattern. Why not this (totally untested but easy convey above comment) on the top of this patch ? # git diff diff --git a/block/genhd.c b/block/genhd.c index 94faec98607b..ff6268970ddc 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -46,25 +46,6 @@ static void disk_add_events(struct gendisk *disk); static void disk_del_events(struct gendisk *disk); static void disk_release_events(struct gendisk *disk); -/* - * Set disk capacity and notify if the size is not currently - * zero and will not be set to zero - */ -void disk_set_capacity(struct gendisk *disk, sector_t size) -{ - sector_t capacity = get_capacity(disk); - - set_capacity(disk, size); - if (capacity != 0 && size != 0) { - char *envp[] = { "RESIZE=1", NULL }; - - kobject_uevent_env(&disk_to_dev(disk)->kobj, KOBJ_CHANGE, envp); - } -} - -EXPORT_SYMBOL_GPL(disk_set_capacity); - - void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, int rw) { if (queue_is_mq(q)) diff --git a/include/linux/genhd.h b/include/linux/genhd.h index d5e87d7cc357..5e595a28f893 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -469,6 +469,22 @@ static inline void set_capacity(struct gendisk *disk, sector_t size) disk->part0.nr_sects = size; } +/* + * Set disk capacity and notify if the size is not currently + * zero and will not be set to zero + */ +static inline void disk_set_capacity(struct gendisk *disk, sector_t size) +{ + sector_t capacity = get_capacity(disk); + + set_capacity(disk, size); + if (capacity != 0 && size != 0) { + char *envp[] = { "RESIZE=1", NULL }; + + kobject_uevent_env(&disk_to_dev(disk)->kobj, KOBJ_CHANGE, envp); + } +} + #ifdef CONFIG_SOLARIS_X86_PARTITION _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme