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TencentOS-kernel/arch/powerpc
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Geoff Levand cf880ca74e powerpc/ps3: Fix kexec shutdown hang 
[ Upstream commit 126554465d93b10662742128918a5fc338cda4aa ]

The ps3_mm_region_destroy() and ps3_mm_vas_destroy() routines
are called very late in the shutdown via kexec's mmu_cleanup_all
routine.  By the time mmu_cleanup_all runs it is too late to use
udbg_printf, and calling it will cause PS3 systems to hang.

Remove all debugging statements from ps3_mm_region_destroy() and
ps3_mm_vas_destroy() and replace any error reporting with calls
to lv1_panic.

With this change builds with 'DEBUG' defined will not cause kexec
reboots to hang, and builds with 'DEBUG' defined or not will end
in lv1_panic if an error is encountered.

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7325c4af2b4c989c19d6a26b90b1fec9c0615ddf.1589049250.git.geoff@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-03-16 16:30:18 +08:00
..
boot Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
configs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
crypto Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
include powerpc/64: Don't initialise init_task->thread.regs 2021-03-16 16:30:16 +08:00
kernel powerpc/64s/exception: Fix machine check no-loss idle wakeup 2021-03-16 16:30:18 +08:00
kvm KVM: PPC: Book3S HV: Fix H_CEDE return code for nested guests 2021-03-16 16:26:34 +08:00
lib Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
math-emu Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
mm powerpc/ptdump: Add _PAGE_COHERENT flag 2021-03-16 16:30:03 +08:00
net Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
oprofile Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
perf powerpc/perf/hv-24x7: Fix inconsistent output values incase multiple hv-24x7 events run 2021-03-16 16:30:04 +08:00
platforms powerpc/ps3: Fix kexec shutdown hang 2021-03-16 16:30:18 +08:00
purgatory Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
sysdev powerpc/xive: Clear the page tables for the ESB IO mapping 2021-03-16 16:28:56 +08:00
tools Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
xmon powerpc/xmon: Restrict when kernel is locked down 2021-03-16 16:28:45 +08:00
Kbuild Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kconfig powerpc/kasan: Fix stack overflow by increasing THREAD_SHIFT 2021-03-16 16:29:58 +08:00
Kconfig.debug Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Makefile Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Makefile.postlink Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00