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usb: common: Use a global definition for 'min3' 

We can use a common global method for calculating minimum of
3 numbers. Put the same in 'common header' and let 'ehci'
use it.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Tom Rini <trini@ti.com>
This commit is contained in:
Vivek Gautam 2013-04-24 02:50:13 +00:00 committed by Marek Vasut
parent 55f4b57542
commit 4f4eab4d14
2 changed files with 21 additions and 14 deletions
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10
drivers/usb/host/ehci-hcd.c
View File

@ -603,16 +603,6 @@ fail:
return -1;
}
static inline int min3(int a, int b, int c)
{
if (b < a)
a = b;
if (c < a)
a = c;
return a;
}
int
ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
int length, struct devrequest *req)

25
include/common.h
View File

@ -199,18 +199,35 @@ typedef void (interrupt_handler_t)(void *);
* General Purpose Utilities
*/
#define min(X, Y) \
({ typeof (X) __x = (X); \
typeof (Y) __y = (Y); \
({ typeof(X) __x = (X); \
typeof(Y) __y = (Y); \
(__x < __y) ? __x : __y; })
#define max(X, Y) \
({ typeof (X) __x = (X); \
typeof (Y) __y = (Y); \
({ typeof(X) __x = (X); \
typeof(Y) __y = (Y); \
(__x > __y) ? __x : __y; })
#define MIN(x, y) min(x, y)
#define MAX(x, y) max(x, y)
#define min3(X, Y, Z) \
({ typeof(X) __x = (X); \
typeof(Y) __y = (Y); \
typeof(Z) __z = (Z); \
__x < __y ? (__x < __z ? __x : __z) : \
(__y < __z ? __y : __z); })
#define max3(X, Y, Z) \
({ typeof(X) __x = (X); \
typeof(Y) __y = (Y); \
typeof(Z) __z = (Z); \
__x > __y ? (__x > __z ? __x : __z) : \
(__y > __z ? __y : __z); })
#define MIN3(x, y, z) min3(x, y, z)
#define MAX3(x, y, z) max3(x, y, z)
/*
* Return the absolute value of a number.
*