[PATCH 1/5] m68k: Fix sigaction kernel definition (BZ #23960)

[Andreas Schwab]

On Dez 12 2018, Adhemerval Zanella <adhemerval.zanella@linaro.org> wrote:

> The m68k kernel does define SA_RESTORER on arch/m68k/include/asm/signal.h
> (__ARCH_HAS_SA_RESTORER),

These are not the same.  The latter only tells <linux/signal_types.h> to
add the sa_restorer member, independent of SA_RESTORER (which m68k
doesn't define).

> but the only difference it makes for m68k is at flush_signal_handlers
> where kernel sets the sa_restorer to NULL. So it indeed should be safe
> to just use default kernel_sigaction.h (I don't see any signal test
> issues). Updated patch below.

This fails to add the sa_restorer member, causing the signal mask to be
mishandled.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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