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| author | Eliezer Tamir <eliezer.tamir@linux.intel.com> | 2013-07-02 23:22:47 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-07-02 15:53:53 -0700 |
| commit | 1bc2774d866444c5b316fd1dc2b782f20c762cf4 (patch) | |
| tree | dfadce12c9f45c80cd372b27456151be000c8aee /fs/select.c | |
| parent | 7e6d4da837385d9aa2e5fd84e0a6042cddc9e708 (diff) | |
| download | linux-1bc2774d866444c5b316fd1dc2b782f20c762cf4.tar.gz linux-1bc2774d866444c5b316fd1dc2b782f20c762cf4.tar.bz2 linux-1bc2774d866444c5b316fd1dc2b782f20c762cf4.zip | |
net: convert lls to use time_in_range()
Time in range will fail safely if we move to a different cpu with an
extremely large clock skew.
Add time_in_range64() and convert lls to use it.
changelog:
v2
- fixed double call to sched_clock in can_poll_ll
- fixed checkpatchisms
Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/select.c')
| -rw-r--r-- | fs/select.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/select.c b/fs/select.c index 36540754bad7..f28a58592725 100644 --- a/fs/select.c +++ b/fs/select.c @@ -403,7 +403,8 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time) int retval, i, timed_out = 0; unsigned long slack = 0; unsigned int ll_flag = ll_get_flag(); - u64 ll_time = ll_end_time(); + u64 ll_start = ll_start_time(ll_flag); + u64 ll_time = ll_run_time(); rcu_read_lock(); retval = max_select_fd(n, fds); @@ -498,7 +499,7 @@ int do_select(int n, fd_set_bits *fds, struct timespec *end_time) } /* only if on, have sockets with POLL_LL and not out of time */ - if (ll_flag && can_ll && can_poll_ll(ll_time)) + if (ll_flag && can_ll && can_poll_ll(ll_start, ll_time)) continue; /* @@ -770,7 +771,8 @@ static int do_poll(unsigned int nfds, struct poll_list *list, int timed_out = 0, count = 0; unsigned long slack = 0; unsigned int ll_flag = ll_get_flag(); - u64 ll_time = ll_end_time(); + u64 ll_start = ll_start_time(ll_flag); + u64 ll_time = ll_run_time(); /* Optimise the no-wait case */ if (end_time && !end_time->tv_sec && !end_time->tv_nsec) { @@ -819,7 +821,7 @@ static int do_poll(unsigned int nfds, struct poll_list *list, break; /* only if on, have sockets with POLL_LL and not out of time */ - if (ll_flag && can_ll && can_poll_ll(ll_time)) + if (ll_flag && can_ll && can_poll_ll(ll_start, ll_time)) continue; /* |