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Preempt-safe RCU file usage

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Fix up fs/compat.c fixes.
This commit is contained in:
Linus Torvalds 2005-09-09 15:42:34 -07:00
parent f0eca9626c
commit ac5b8b6f22
1 changed files with 2 additions and 0 deletions
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2
fs/compat.c
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@ -1645,8 +1645,10 @@ compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp
goto out_nofds; goto out_nofds;
/* max_fdset can increase, so grab it once to avoid race */ /* max_fdset can increase, so grab it once to avoid race */
rcu_read_lock();
fdt = files_fdtable(current->files); fdt = files_fdtable(current->files);
max_fdset = fdt->max_fdset; max_fdset = fdt->max_fdset;
rcu_read_unlock();
if (n > max_fdset) if (n > max_fdset)
n = max_fdset; n = max_fdset;