Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932777AbcK1T6t (ORCPT ); Mon, 28 Nov 2016 14:58:49 -0500 Received: from p3plsmtps2ded02.prod.phx3.secureserver.net ([208.109.80.59]:52634 "EHLO p3plsmtps2ded02.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755060AbcK1T4r (ORCPT ); Mon, 28 Nov 2016 14:56:47 -0500 x-originating-ip: 72.167.245.219 From: Matthew Wilcox To: linux-kernel@vger.kernel.org, Andrew Morton , Konstantin Khlebnikov , Ross Zwisler Cc: Matthew Wilcox , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Kirill A . Shutemov" Subject: [PATCH v3 28/33] idr: Add ida_is_empty Date: Mon, 28 Nov 2016 13:51:06 -0800 Message-Id: <1480369871-5271-63-git-send-email-mawilcox@linuxonhyperv.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1480369871-5271-1-git-send-email-mawilcox@linuxonhyperv.com> References: <1480369871-5271-1-git-send-email-mawilcox@linuxonhyperv.com> X-CMAE-Envelope: MS4wfIu4Vliv1NpGz/K1xt/6WI9LcfI2OfDd5Y86q5VumxxJU5OeJUjtaJXy7IctvkxHtg+GX5IA5VKGDJ8nLnUbBkfbJ+hlsX7OKka0PoAb9PqgDZDCCf4n CT4Wsj9VV2NmLPiKb4l5Af/ZyDNu5q/14FQ6XnVtMQ3aKPflAlnXasQp8NVkpsZ5xT/DybNa/SAmg3Y1XPtGc12RPCZtkxaNqNtBv9U15cMaHOa0+Y+w/Om1 DGfyQPz0JPO2AAVKTGc8ApZSCgJU9+79fl/RN1eoKgh68XHqSKXNgAtQCdxiBbb4sGetNivEzgMMbZcPngJle2MtEueVBGWzME+gOepTBWwbdX43kwsTL5W9 lwJa+B7p18NJrj7x/wNTWKrmYZJWs7uSZyXBoo9n7jPxYbNQjuK3qczdVcqXSCXgSKA+80/MioLxmvBtogMR06A0BcIAQ9cTS/f8RKzDMPHfc7BmdWM= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2994 Lines: 93 From: Matthew Wilcox Two of the USB Gadgets were poking around in the internals of struct ida in order to determine if it is empty. Add the appropriate abstraction. Signed-off-by: Matthew Wilcox Acked-by: Konstantin Khlebnikov --- drivers/usb/gadget/function/f_hid.c | 6 +++--- drivers/usb/gadget/function/f_printer.c | 6 +++--- include/linux/idr.h | 5 +++++ 3 files changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c index 7abd70b..3151d2a 100644 --- a/drivers/usb/gadget/function/f_hid.c +++ b/drivers/usb/gadget/function/f_hid.c @@ -905,7 +905,7 @@ static void hidg_free_inst(struct usb_function_instance *f) mutex_lock(&hidg_ida_lock); hidg_put_minor(opts->minor); - if (idr_is_empty(&hidg_ida.idr)) + if (ida_is_empty(&hidg_ida)) ghid_cleanup(); mutex_unlock(&hidg_ida_lock); @@ -931,7 +931,7 @@ static struct usb_function_instance *hidg_alloc_inst(void) mutex_lock(&hidg_ida_lock); - if (idr_is_empty(&hidg_ida.idr)) { + if (ida_is_empty(&hidg_ida)) { status = ghid_setup(NULL, HIDG_MINORS); if (status) { ret = ERR_PTR(status); @@ -944,7 +944,7 @@ static struct usb_function_instance *hidg_alloc_inst(void) if (opts->minor < 0) { ret = ERR_PTR(opts->minor); kfree(opts); - if (idr_is_empty(&hidg_ida.idr)) + if (ida_is_empty(&hidg_ida)) ghid_cleanup(); goto unlock; } diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c index 0de36cd..8054da9 100644 --- a/drivers/usb/gadget/function/f_printer.c +++ b/drivers/usb/gadget/function/f_printer.c @@ -1265,7 +1265,7 @@ static void gprinter_free_inst(struct usb_function_instance *f) mutex_lock(&printer_ida_lock); gprinter_put_minor(opts->minor); - if (idr_is_empty(&printer_ida.idr)) + if (ida_is_empty(&printer_ida)) gprinter_cleanup(); mutex_unlock(&printer_ida_lock); @@ -1289,7 +1289,7 @@ static struct usb_function_instance *gprinter_alloc_inst(void) mutex_lock(&printer_ida_lock); - if (idr_is_empty(&printer_ida.idr)) { + if (ida_is_empty(&printer_ida)) { status = gprinter_setup(PRINTER_MINORS); if (status) { ret = ERR_PTR(status); @@ -1302,7 +1302,7 @@ static struct usb_function_instance *gprinter_alloc_inst(void) if (opts->minor < 0) { ret = ERR_PTR(opts->minor); kfree(opts); - if (idr_is_empty(&printer_ida.idr)) + if (ida_is_empty(&printer_ida)) gprinter_cleanup(); goto unlock; } diff --git a/include/linux/idr.h b/include/linux/idr.h index 083d61e..3639a28 100644 --- a/include/linux/idr.h +++ b/include/linux/idr.h @@ -195,6 +195,11 @@ static inline int ida_get_new(struct ida *ida, int *p_id) return ida_get_new_above(ida, 0, p_id); } +static inline bool ida_is_empty(struct ida *ida) +{ + return idr_is_empty(&ida->idr); +} + void __init idr_init_cache(void); #endif /* __IDR_H__ */ -- 2.10.2