From: Jan Beulich Date: Wed, 16 Aug 2017 09:02:48 +0000 (+0200) Subject: gnttab: use DIV_ROUND_UP() instead of open-coding it X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~1680 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=c98e9ec647df00a5726e00c93bd69a4d5a2d88e7;p=xen.git gnttab: use DIV_ROUND_UP() instead of open-coding it Also adjust formatting of nearby code. Signed-off-by: Jan Beulich Reviewed-by: Andrew Cooper --- diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c index 5bfaf3889c..9506c02391 100644 --- a/xen/common/grant_table.c +++ b/xen/common/grant_table.c @@ -206,11 +206,13 @@ static inline void gnttab_flush_tlb(const struct domain *d) static inline unsigned int num_act_frames_from_sha_frames(const unsigned int num) { - /* How many frames are needed for the active grant table, - * given the size of the shared grant table? */ + /* + * How many frames are needed for the active grant table, + * given the size of the shared grant table? + */ unsigned int sha_per_page = PAGE_SIZE / sizeof(grant_entry_v1_t); - unsigned int num_sha_entries = num * sha_per_page; - return (num_sha_entries + (ACGNT_PER_PAGE - 1)) / ACGNT_PER_PAGE; + + return DIV_ROUND_UP(num * sha_per_page, ACGNT_PER_PAGE); } #define max_nr_active_grant_frames \