staging: vc04_services: Using macro DIV_ROUND_UP

The macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /(d)).
It clarifies the divisor calculations. This occurence was detected using
the coccinelle script:

@@
expression e1;
expression e2;
@@
(
- ((e1) + e2 - 1) / (e2)
+ DIV_ROUND_UP(e1,e2)
|
- ((e1) + (e2 - 1)) / (e2)
+ DIV_ROUND_UP(e1,e2)
)

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
index 2040fe5..7177953 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
@@ -408,7 +408,7 @@ create_pagelist(char __user *buf, size_t count, unsigned short type,
        dma_addr_t dma_addr;
 
        offset = ((unsigned int)(unsigned long)buf & (PAGE_SIZE - 1));
-       num_pages = (count + offset + PAGE_SIZE - 1) / PAGE_SIZE;
+       num_pages = DIV_ROUND_UP(count + offset, PAGE_SIZE);
 
        pagelist_size = sizeof(PAGELIST_T) +
                        (num_pages * sizeof(u32)) +

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index 61a5920..dc4569e 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -1587,7 +1587,7 @@ dump_phys_mem(void *virt_addr, u32 num_bytes)
        offset = (int)(long)virt_addr & (PAGE_SIZE - 1);
        end_offset = (int)(long)end_virt_addr & (PAGE_SIZE - 1);
 
-       num_pages = (offset + num_bytes + PAGE_SIZE - 1) / PAGE_SIZE;
+       num_pages = DIV_ROUND_UP(offset + num_bytes, PAGE_SIZE);
 
        pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL);
        if (pages == NULL) {