linux-kernel - Re: Documentation/timers/hpet

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Date:	Sat, 29 May 2010 11:41:42 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Documentation/timers/hpet_example.c compile bug

On 05/28/10 04:35, Heiko Carstens wrote:
> Hi Randy,
> 
> since your commit e61863099f58e458f08c101da87da752a1e009f5
> "Documentation/timers/: split txt and source files" I get this compile
> error on s390 with an allyesconfig:
> 
> In file included from Documentation/timers/hpet_example.c:15:
> /usr/include/linux/hpet.h:11: error: expected specifier-qualifier-list before 'u64'

Where is the u64?  My (x86_64) copy of /usr/include/linux/hpet.h looks like:

     1	#ifndef	__HPET__
     2	#define	__HPET__ 1
     3	
     4	
     5	
     6	
     7	struct hpet_info {
     8		unsigned long hi_ireqfreq;	/* Hz */
     9		unsigned long hi_flags;	/* information */
    10		unsigned short hi_hpet;
    11		unsigned short hi_timer;
    12	};
    13	
    14	#define HPET_INFO_PERIODIC	0x0010	/* periodic-capable comparator */
    15	
    16	#define	HPET_IE_ON	_IO('h', 0x01)	/* interrupt on */
    17	#define	HPET_IE_OFF	_IO('h', 0x02)	/* interrupt off */
    18	#define	HPET_INFO	_IOR('h', 0x03, struct hpet_info)
    19	#define	HPET_EPI	_IO('h', 0x04)	/* enable periodic */
    20	#define	HPET_DPI	_IO('h', 0x05)	/* disable periodic */
    21	#define	HPET_IRQFREQ	_IOW('h', 0x6, unsigned long)	/* IRQFREQ usec */
    22	
    23	#endif				/* !__HPET__ */

I guess s390 hpet.h looks different?  Does it just need to #include <linux/types.h> ?
Or is the problem the kernel-space u64 vs. userspace __u64?

> Please fix.

Any suggestions?

-- 
~Randy
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