[Xen-changelog] [xen master] gnttab: use DIV_ROUND_UP() instead of open-coding it

[patchbot@xxxxxxx]

commit c98e9ec647df00a5726e00c93bd69a4d5a2d88e7
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Wed Aug 16 11:02:48 2017 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Aug 16 11:02:48 2017 +0200

    gnttab: use DIV_ROUND_UP() instead of open-coding it
    
    Also adjust formatting of nearby code.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/common/grant_table.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index 5bfaf38..9506c02 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 \
--
generated by git-patchbot for /home/xen/git/xen.git#master

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