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| author | David S. Miller <davem@davemloft.net> | 2006-01-19 16:40:42 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-19 22:11:31 -0800 |
| commit | 7e732bfc5570b8f9bb5f155cf36e94b2e7d6bf6a (patch) | |
| tree | f1f15646c7a9488cf0cd0838d04b8bde1193ef21 /fs/compat.c | |
| parent | 0f36b018b2e314d45af86449f1a97facb1fbe300 (diff) | |
| download | lwn-7e732bfc5570b8f9bb5f155cf36e94b2e7d6bf6a.tar.gz lwn-7e732bfc5570b8f9bb5f155cf36e94b2e7d6bf6a.zip | |
[PATCH] Fix regression added by ppoll/pselect code.
The compat layer timeout handling changes in:
9f72949f679df06021c9e43886c9191494fdb007
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>
Diffstat (limited to 'fs/compat.c')
| -rw-r--r-- | fs/compat.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/compat.c b/fs/compat.c index 18b21b4c9e3a..ff0bafcff720 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -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; } |