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Nicholas Piggin 4f242fc5f2 powerpc/pseries: warn if recursing into the hcall tracing code 
The hcall tracing code has a recursion check built in, which skips
tracing if we are already tracing an hcall.

However if the tracing code has problems with recursion, this check
may not catch all cases because the tracing code could be invoked from
a different tracepoint first, then make an hcall that gets traced,
then recurse.

Add an explicit warning if recursion is detected here, which might help
to notice tracing code making hcalls. Really the core trace code should
have its own recursion checking and warnings though.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210508101455.1578318-5-npiggin@gmail.com
2021-05-12 11:07:39 +10:00
..
boot kbuild: replace LANG=C with LC_ALL=C 2021-05-02 00:43:35 +09:00
configs powerpc updates for 5.13 2021-04-30 12:22:28 -07:00
crypto crypto: powepc/sha1 - remove unneeded semicolon 2021-03-07 15:13:14 +11:00
include powerpc/pseries: use notrace hcall variant for H_CEDE idle 2021-05-12 11:07:38 +10:00
kernel powerpc/syscall: Calling kuap_save_and_lock() is wrong 2021-05-12 11:07:38 +10:00
kexec powerpc/kexec_file: Use current CPU info while setting up FDT 2021-05-04 22:26:57 +10:00
kvm KVM: PPC: Book3S HV: Fix conversion to gfn-based MMU notifier callbacks 2021-05-06 00:25:42 +10:00
lib powerpc/32: Fix boot failure with CONFIG_STACKPROTECTOR 2021-05-04 22:28:05 +10:00
math-emu powerpc/math: Fix missing __user qualifier for get_user() and other sparse warnings 2021-03-29 13:22:12 +11:00
mm Merge branch 'akpm' (patches from Andrew) 2021-05-05 13:50:15 -07:00
net powerpc/ebpf32: Use standard function call for functions within 32M distance 2021-04-21 22:52:33 +10:00
perf powerpc/perf: Fix the threshold event selection for memory events in power10 2021-04-23 01:38:02 +10:00
platforms powerpc/pseries: warn if recursing into the hcall tracing code 2021-05-12 11:07:39 +10:00
purgatory powerpc/kexec: Don't use .machine ppc64 in trampoline_64.S 2021-04-08 21:17:43 +10:00
sysdev Merge branch 'akpm' (patches from Andrew) 2021-04-30 14:38:01 -07:00
tools powerpc/tools: Remove 90 line limit in checkpatch script 2020-09-08 22:57:11 +10:00
xmon powerpc updates for 5.13 2021-04-30 12:22:28 -07:00
Kbuild
Kconfig Merge branch 'master' into next 2021-05-08 21:12:55 +10:00
Kconfig.debug powerpc: iommu: fix build when neither PCI or IBMVIO is set 2021-04-08 21:17:46 +10:00
Makefile powerpc: Only define _TASK_CPU for 32-bit 2021-04-20 14:22:24 +10:00
Makefile.postlink powerpc: unrel_branch_check.sh: use nm to find symbol value 2020-09-02 11:00:22 +10:00