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| author | Ralf Baechle <ralf@linux-mips.org> | 2012-11-06 14:27:19 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2012-12-12 16:52:07 +0100 |
| commit | 9ec9b5ac239ebfff333c25c4a7d34649cb29e4e4 (patch) | |
| tree | add188e2bf10446cc998cdc7b768c3aa7945ff95 /arch/mips | |
| parent | 90c9e79f5dc5af4ea16ad56dda8b648d21037486 (diff) | |
| download | blackbird-op-linux-9ec9b5ac239ebfff333c25c4a7d34649cb29e4e4.tar.gz blackbird-op-linux-9ec9b5ac239ebfff333c25c4a7d34649cb29e4e4.zip | |
MIPS: Fix harmlessly missing else statement.
The actual bug is a missing else statement - but really this should be
expressed using a switch() statement.
Found by Al Viro who writes "the funny thing is, it *does* work only
because r2 is syscall number and syscall number around 512 => return
value being ENOSYS and not one of ERESTART... so we really can't hit
the first if and emerge from it with ERESTART_RESTARTBLOCK. still
wrong to write it that way..."
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/kernel/signal.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c index 0e1a5b8ae817..b6aa77035019 100644 --- a/arch/mips/kernel/signal.c +++ b/arch/mips/kernel/signal.c @@ -568,17 +568,20 @@ static void do_signal(struct pt_regs *regs) } if (regs->regs[0]) { - if (regs->regs[2] == ERESTARTNOHAND || - regs->regs[2] == ERESTARTSYS || - regs->regs[2] == ERESTARTNOINTR) { + switch (regs->regs[2]) { + case ERESTARTNOHAND: + case ERESTARTSYS: + case ERESTARTNOINTR: regs->regs[2] = regs->regs[0]; regs->regs[7] = regs->regs[26]; regs->cp0_epc -= 4; - } - if (regs->regs[2] == ERESTART_RESTARTBLOCK) { + break; + + case ERESTART_RESTARTBLOCK: regs->regs[2] = current->thread.abi->restart; regs->regs[7] = regs->regs[26]; regs->cp0_epc -= 4; + break; } regs->regs[0] = 0; /* Don't deal with this again. */ } |
