powerpc/40x: add exception frame marker
This patch adds STACK_FRAME_REGS_MARKER in the stack at exception entry
in order to see interrupts in call traces as below:
[ 0.013964] Call Trace:
[ 0.014014] [
c0745db0] [
c007a9d4] tick_periodic.constprop.5+0xd8/0x104 (unreliable)
[ 0.014086] [
c0745dc0] [
c007aa20] tick_handle_periodic+0x20/0x9c
[ 0.014181] [
c0745de0] [
c0009cd0] timer_interrupt+0xa0/0x264
[ 0.014258] [
c0745e10] [
c000e484] ret_from_except+0x0/0x14
[ 0.014390] --- interrupt: 901 at console_unlock.part.7+0x3f4/0x528
[ 0.014390] LR = console_unlock.part.7+0x3f0/0x528
[ 0.014455] [
c0745ee0] [
c0050334] console_unlock.part.7+0x114/0x528 (unreliable)
[ 0.014542] [
c0745f30] [
c00524e0] register_console+0x3d8/0x44c
[ 0.014625] [
c0745f60] [
c0675aac] cpm_uart_console_init+0x18/0x2c
[ 0.014709] [
c0745f70] [
c06614f4] console_init+0x114/0x1cc
[ 0.014795] [
c0745fb0] [
c0658b68] start_kernel+0x300/0x3d8
[ 0.014864] [
c0745ff0] [
c00022cc] start_here+0x44/0x98
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
projects / linux-2.6-block.git / commit