openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

x86/xen: Use DIV_ROUND_UP 

The kernel.h macro DIV_ROUND_UP performs the computation
(((n) + (d) - 1) /(d)) but is perhaps more readable.

The Coccinelle script used to make this change is as follows:
@haskernel@
@@

#include <linux/kernel.h>

@depends on haskernel@
expression n,d;
@@

(
- (n + d - 1) / d
+ DIV_ROUND_UP(n,d)
|
- (n + (d - 1)) / d
+ DIV_ROUND_UP(n,d)
)

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Amitoj Kaur Chawla 2016-06-29 20:30:38 +05:30 committed by David Vrabel
parent 5ee405d9d2
commit 585423c8c4
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/xen/enlighten.c
View File

@ -590,7 +590,7 @@ static void xen_load_gdt(const struct desc_ptr *dtr)
{ {
unsigned long va = dtr->address; unsigned long va = dtr->address;
unsigned int size = dtr->size + 1; unsigned int size = dtr->size + 1;
unsigned pages = (size + PAGE_SIZE - 1) / PAGE_SIZE; unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
unsigned long frames[pages]; unsigned long frames[pages];
int f; int f;
@ -639,7 +639,7 @@ static void __init xen_load_gdt_boot(const struct desc_ptr *dtr)
{ {
unsigned long va = dtr->address; unsigned long va = dtr->address;
unsigned int size = dtr->size + 1; unsigned int size = dtr->size + 1;
unsigned pages = (size + PAGE_SIZE - 1) / PAGE_SIZE; unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
unsigned long frames[pages]; unsigned long frames[pages];
int f; int f;