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OpenCloudOS-Kernel
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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
..
alpha Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
arc Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
arm i.MX fixes for 5.3: 2019-07-23 10:13:24 -07:00
arm64 SPDX fixes for 5.3-rc2 2019-07-28 10:00:06 -07:00
c6x Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2019-07-10 21:42:03 -07:00
csky treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers 2019-07-25 11:05:10 +02:00
h8300 h8300 update for 5.3 2019-07-17 09:36:38 -07:00
hexagon hexagon: switch to generic version of pte allocation 2019-07-21 09:53:00 -07:00
ia64 Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-07-19 10:42:02 -07:00
m68k arch: mark syscall number 435 reserved for clone3 2019-07-15 00:39:33 +02:00
microblaze clone3-v5.3 2019-07-11 10:09:44 -07:00
mips This round of clk driver and framework updates is heavy on the driver update 2019-07-17 10:07:48 -07:00
nds32 treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers 2019-07-25 11:05:10 +02:00
nios2 nios2 update for v5.3-rc1 2019-07-12 15:38:05 -07:00
openrisc dma-mapping updates for Linux 5.3 2019-07-12 15:13:55 -07:00
parisc parisc: Flush ITLB in flush_tlb_all_local() only on split TLB machines 2019-07-21 11:03:02 +02:00
powerpc powerpc: Use ftrace_graph_ret_addr() when unwinding 2019-09-18 12:24:55 +10:00
riscv SPDX fixes for 5.3-rc2 2019-07-28 10:00:06 -07:00
s390 s390/mm: Remove sev_active() function 2019-08-09 22:52:11 +10:00
sh treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers 2019-07-25 11:05:10 +02:00
sparc treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers 2019-07-25 11:05:10 +02:00
um This pull request contains the following changes for UML: 2019-07-14 17:17:34 -07:00
unicore32 Kconfig updates for v5.3 2019-07-12 16:06:27 -07:00
x86 fs/core/vmcore: Move sev_active() reference to x86 arch code 2019-08-09 22:52:10 +10:00
xtensa Merge branch 'akpm' (patches from Andrew) 2019-07-17 08:58:04 -07:00
.gitignore
…
Kconfig x86, s390: Move ARCH_HAS_MEM_ENCRYPT definition to arch/Kconfig 2019-08-09 22:52:06 +10:00