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[PATCH] Fix regression added by ppoll/pselect code.

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The compat layer timeout handling changes in:

9f72949f67

are busted.  This is most easily seen with an X application
that uses sub-second select/poll timeout such as emacs.  You
hit a key and it takes a second or so before the app responds.

The two ROUND_UP() calls upon entry are using {tv,ts}_sec where it
should instead be using {tv_usec,ts_nsec}, which perfectly explains
the observed incorrect behavior.

Another bug shot down with git bisect.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David S. Miller 2006-01-19 16:40:42 -08:00 committed by Linus Torvalds
parent 0f36b018b2
commit 7e732bfc55
1 changed files with 2 additions and 2 deletions
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4
fs/compat.c
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@ -1743,7 +1743,7 @@ asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
timeout = -1; /* infinite */
else {
timeout = ROUND_UP(tv.tv_sec, 1000000/HZ);
timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
timeout += tv.tv_sec * HZ;
}
}
@ -1884,7 +1884,7 @@ asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
/* We assume that ts.tv_sec is always lower than
the number of seconds that can be expressed in
an s64. Otherwise the compiler bitches at us */
timeout = ROUND_UP(ts.tv_sec, 1000000000/HZ);
timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
timeout += ts.tv_sec * HZ;
}