From: "Jan Beulich" <JBeulich@suse.com>
To: xen-devel <xen-devel@lists.xenproject.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Wei Liu <wei.liu2@citrix.com>,
George Dunlap <George.Dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>
Subject: [PATCH 7/8] gnttab: use DIV_ROUND_UP() instead of open-coding it
Date: Tue, 15 Aug 2017 08:42:06 -0600 [thread overview]
Message-ID: <5993245E020000780016FF18@prv-mh.provo.novell.com> (raw)
In-Reply-To: <59931E0F020000780016FEA3@prv-mh.provo.novell.com>
Also adjust formatting of nearby code.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -206,11 +206,13 @@ static inline void gnttab_flush_tlb(cons
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 \
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next prev parent reply other threads:[~2017-08-15 14:42 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-15 14:15 [PATCH 0/8] gnttab: recent XSA follow-up Jan Beulich
2017-08-15 14:38 ` [PATCH RESEND 1/8] gnttab: drop useless locking Jan Beulich
2017-08-15 16:08 ` Andrew Cooper
2017-08-15 14:39 ` [PATCH RESEND 2/8] gnttab: avoid spurious maptrack handle allocation failures Jan Beulich
2017-08-15 16:52 ` Andrew Cooper
2017-08-15 14:40 ` [PATCH 3/8] gnttab: type adjustments Jan Beulich
2017-08-15 17:04 ` Andrew Cooper
2017-08-15 14:40 ` [PATCH 4/8] gnttab: drop pointless leading double underscores Jan Beulich
2017-08-15 17:09 ` Andrew Cooper
2017-08-15 14:41 ` [PATCH 5/8] gnttab: re-arrange struct active_grant_entry Jan Beulich
2017-08-15 17:12 ` Andrew Cooper
2017-08-15 14:41 ` [PATCH 6/8] gnttab: move GNTPIN_* out of header file Jan Beulich
2017-08-15 17:14 ` Andrew Cooper
2017-08-16 6:54 ` Jan Beulich
2017-08-15 14:42 ` Jan Beulich [this message]
2017-08-15 17:15 ` [PATCH 7/8] gnttab: use DIV_ROUND_UP() instead of open-coding it Andrew Cooper
2017-08-15 14:42 ` [PATCH 8/8] gnttab: drop struct active_grant_entry's gfn field for release builds Jan Beulich
2017-08-15 17:18 ` Andrew Cooper
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