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microblaze: rt_sigreturn is too trigger-happy about sigaltstack errors
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -111,7 +111,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
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/* It is more difficult to avoid calling this function than to
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call it and ignore errors. */
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if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->r1))
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if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->r1) == -EFAULT)
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goto badframe;
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return rval;
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