All three applied, thanks !
Oren.
Nathan Lynch wrote:
> This reverts commit 64dab5da66f4fe212b43272ffa5e7a3403a64deb.
>
> This way of handling syscall restart is incorrect -- it occurs too
> early in the restart process, and restore_retval is doing the wrong
> thing for powerpc anyway (fixed in a later patch). While the reverted
> patch managed to address the case of system calls with restart blocks,
> other restartable system calls behave incorrectly after restart.
> ---
> arch/powerpc/kernel/checkpoint.c | 25 -------------------------
> 1 files changed, 0 insertions(+), 25 deletions(-)
>
> diff --git a/arch/powerpc/kernel/checkpoint.c
> b/arch/powerpc/kernel/checkpoint.c
> index cd384df..2634011 100644
> --- a/arch/powerpc/kernel/checkpoint.c
> +++ b/arch/powerpc/kernel/checkpoint.c
> @@ -307,31 +307,6 @@ static int restore_gprs(const struct ckpt_hdr_cpu
> *cpu_hdr,
> regs->orig_gpr3 = cpu_hdr->orig_gpr3;
>
> regs->msr = sanitize_msr(regs->msr);
> -
> - /* The normal servicing of the freezer's fake signal is
> - * short-circuited by checkpoint/restart. See
> - * arch/powerpc/kernel/signal.c::do_signal_pending().
> - */
> - if (TRAP(regs) != 0x0C00)
> - goto out;
> - if (!(regs->ccr & 0x10000000))
> - goto out;
> -
> - switch (regs->gpr[3]) {
> - case ERESTARTNOHAND:
> - case ERESTARTSYS:
> - case ERESTARTNOINTR:
> - regs->gpr[3] = regs->orig_gpr3;
> - break;
> - case ERESTART_RESTARTBLOCK:
> - regs->gpr[0] = __NR_restart_syscall;
> - break;
> - default:
> - goto out;
> - }
> -
> - regs->nip -= 4;
> - regs->result = 0;
> out:
> return rc;
> }
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