[RESEND][PATCH] better compat_jiffies_to_clock_t

Stephen Rothwell (sfr@canb.auug.org.au)
Mon, 23 Dec 2002 14:54:39 +1100

Hi Linus,

[Resent because it hasn't truned up yet and I haven't had any
opposition.]

At David Mosberger's suggestion can we use this new version of
compat_jiffies_to_clock_t? It does better rounding and will not fail
if COMPAT_USER_HZ > HZ.

Please apply.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/


diff -ruN 2.5.52-32bit.base/include/linux/compat.h 2.5.52-32bit.clock/include/linux/compat.h
--- 2.5.52-32bit.base/include/linux/compat.h	2002-12-16 14:49:54.000000000 +1100
+++ 2.5.52-32bit.clock/include/linux/compat.h	2002-12-17 15:20:18.000000000 +1100
@@ -9,9 +9,11 @@
 #ifdef CONFIG_COMPAT
 
 #include <linux/stat.h>
+#include <linux/param.h>	/* for HZ */
 #include <asm/compat.h>
 
-#define compat_jiffies_to_clock_t(x)	((x) / (HZ / COMPAT_USER_HZ))
+#define compat_jiffies_to_clock_t(x)	\
+		(((unsigned long long)(x) * COMPAT_USER_HZ) / HZ)
 
 struct compat_utimbuf {
 	compat_time_t		actime;





-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
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