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| author | Ralf Baechle <ralf@linux-mips.org> | 2007-03-15 17:08:28 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-03-17 01:03:27 +0000 |
| commit | 9e34682026572f07328208f7d2b2c611d2001844 (patch) | |
| tree | 56b84e65b2be6d1edba7a364888726aed433ea95 /arch/mips/kernel/rtlx.c | |
| parent | 080e948c079f7aa7c4dce7f14b046519886ccabc (diff) | |
| download | linux-stable-9e34682026572f07328208f7d2b2c611d2001844.tar.gz linux-stable-9e34682026572f07328208f7d2b2c611d2001844.tar.bz2 linux-stable-9e34682026572f07328208f7d2b2c611d2001844.zip | |
[MIPS] RTLX: Don't use volatile; it's fragile.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/rtlx.c')
| -rw-r--r-- | arch/mips/kernel/rtlx.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c index e14ae09eda2b..16d3fdecf3ea 100644 --- a/arch/mips/kernel/rtlx.c +++ b/arch/mips/kernel/rtlx.c @@ -146,7 +146,7 @@ static void stopping(int vpe) int rtlx_open(int index, int can_sleep) { - volatile struct rtlx_info **p; + struct rtlx_info **p; struct rtlx_channel *chan; enum rtlx_state state; int ret = 0; @@ -179,13 +179,24 @@ int rtlx_open(int index, int can_sleep) } } + smp_rmb(); if (*p == NULL) { if (can_sleep) { - __wait_event_interruptible(channel_wqs[index].lx_queue, - *p != NULL, - ret); - if (ret) + DEFINE_WAIT(wait); + + for (;;) { + prepare_to_wait(&channel_wqs[index].lx_queue, &wait, TASK_INTERRUPTIBLE); + smp_rmb(); + if (*p != NULL) + break; + if (!signal_pending(current)) { + schedule(); + continue; + } + ret = -ERESTARTSYS; goto out_fail; + } + finish_wait(&channel_wqs[index].lx_queue, &wait); } else { printk(" *vpe_get_shared is NULL. " "Has an SP program been loaded?\n"); |