[SPARC64]: Drop %gl to 0 before re-enabling PSTATE_IE in rtrap



If we take a window fault, on SUN4V set %gl to zero before we
turn PSTATE_IE back on in %pstate.  Otherwise if we take an
interrupt we'll end up with corrupt register state.

Signed-off-by: David S. Miller <davem@davemloft.net>

parent d7744a09

arch/sparc64/kernel/rtrap.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -333,7 +333,6 @@ user_rtt_fill_fixup:

		mov %g6, %l1
		wrpr %g0, 0x0, %tl
		wrpr %g0, RTRAP_PSTATE, %pstate

		661: nop
		.section .sun4v_1insn_patch, "ax"
		@@ -341,6 +340,8 @@ user_rtt_fill_fixup:
		SET_GL(0)
		.previous

		wrpr %g0, RTRAP_PSTATE, %pstate

		mov %l1, %g6
		ldx [%g6 + TI_TASK], %g4
		LOAD_PER_CPU_BASE(%g5, %g6, %g1, %g2, %g3)