Naveen N. Rao 7c1bb6bbf7 powerpc: Use ftrace_graph_ret_addr() when unwinding ... With support for HAVE_FUNCTION_GRAPH_RET_ADDR_PTR, ftrace_graph_ret_addr() provides more robust unwinding when function graph is in use. Update show_stack() to use the same. With dump_stack() added to sysrq_sysctl_handler(), before this patch: root@(none):/sys/kernel/debug/tracing# cat /proc/sys/kernel/sysrq CPU: 0 PID: 218 Comm: cat Not tainted 5.3.0-rc7-00868-g8453ad4a078c-dirty #20 Call Trace: [c0000000d1e13c30] [c00000000006ab98] return_to_handler+0x0/0x40 (dump_stack+0xe8/0x164) (unreliable) [c0000000d1e13c80] [c000000000145680] sysrq_sysctl_handler+0x48/0xb8 [c0000000d1e13cd0] [c00000000006ab98] return_to_handler+0x0/0x40 (proc_sys_call_handler+0x274/0x2a0) [c0000000d1e13d60] [c00000000006ab98] return_to_handler+0x0/0x40 (return_to_handler+0x0/0x40) [c0000000d1e13d80] [c00000000006ab98] return_to_handler+0x0/0x40 (__vfs_read+0x3c/0x70) [c0000000d1e13dd0] [c00000000006ab98] return_to_handler+0x0/0x40 (vfs_read+0xb8/0x1b0) [c0000000d1e13e20] [c00000000006ab98] return_to_handler+0x0/0x40 (ksys_read+0x7c/0x140) After this patch: Call Trace: [c0000000d1e33c30] [c00000000006ab58] return_to_handler+0x0/0x40 (dump_stack+0xe8/0x164) (unreliable) [c0000000d1e33c80] [c000000000145680] sysrq_sysctl_handler+0x48/0xb8 [c0000000d1e33cd0] [c00000000006ab58] return_to_handler+0x0/0x40 (proc_sys_call_handler+0x274/0x2a0) [c0000000d1e33d60] [c00000000006ab58] return_to_handler+0x0/0x40 (__vfs_read+0x3c/0x70) [c0000000d1e33d80] [c00000000006ab58] return_to_handler+0x0/0x40 (vfs_read+0xb8/0x1b0) [c0000000d1e33dd0] [c00000000006ab58] return_to_handler+0x0/0x40 (ksys_read+0x7c/0x140) [c0000000d1e33e20] [c00000000006ab58] return_to_handler+0x0/0x40 (system_call+0x5c/0x68) Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/dc89c9a887121342d9c7819482c3dabdece2a323.1567707399.git.naveen.n.rao@linux.vnet.ibm.com		2019-09-18 12:24:55 +10:00
..
boot	powerpc: Add support for adding an ESM blob to the zImage wrapper	2019-08-30 09:53:29 +10:00
configs	powerpc/configs: Enable secure guest support in pseries and ppc64 defconfigs	2019-08-30 09:56:30 +10:00
crypto	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
include	powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR	2019-09-18 12:24:55 +10:00
kernel	powerpc: Use ftrace_graph_ret_addr() when unwinding	2019-09-18 12:24:55 +10:00
kvm	powerpc/64s/radix: introduce options to disable use of the tlbie instruction	2019-09-05 14:22:41 +10:00
lib	powerpc/memcpy: Fix stack corruption for smaller sizes	2019-09-12 09:27:00 +10:00
math-emu
mm	powerpc/mm/radix: remove useless kernel messages	2019-09-14 00:04:46 +10:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-17 20:20:36 -07:00
oprofile
perf	powerpc/perf: fix imc allocation failure handling	2019-08-20 21:22:20 +10:00
platforms	powerpc/fadump: support holes in kernel boot memory area	2019-09-14 00:04:46 +10:00
purgatory	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
sysdev	powerpc/xmon: Fix output of XIVE IPI	2019-09-14 00:58:47 +10:00
tools
xmon	powerpc/xmon: Improve output of XIVE interrupts	2019-09-14 00:58:47 +10:00
Kbuild
Kconfig	powerpc/opalcore: export /sys/firmware/opal/core for analysing opal crashes	2019-09-14 00:04:45 +10:00
Kconfig.debug
Makefile	powerpc: remove meaningless KBUILD_ARFLAGS addition	2019-08-22 23:11:48 +10:00
Makefile.postlink