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;
}
--
1.6.0.6
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