From d160ea3368a5e5febe25ff9b753cb25b2b3a01b1 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Wed, 14 Dec 2016 15:09:13 -0800 Subject: idr: add ida_is_empty 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. Change-Id: I48338e05940ee795953a3323d4d08b5c5c1e2fcc Link: http://lkml.kernel.org/r/1480369871-5271-63-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox Acked-by: Konstantin Khlebnikov Tested-by: Kirill A. Shutemov Cc: Ross Zwisler Cc: Felipe Balbi Cc: Greg Kroah-Hartman Cc: Michal Nazarewicz Cc: Matthew Wilcox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Git-commit: 99c494077e2d4282a17120a772eecc00ec3004cc Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Signed-off-by: Ajay Agarwal --- include/linux/idr.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/idr.h b/include/linux/idr.h index 013fd9bc4cb6..0708f79f32f6 100644 --- a/include/linux/idr.h +++ b/include/linux/idr.h @@ -181,6 +181,11 @@ 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__ */ -- cgit v1.2.3