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Conor Dooley ab89b8a67f RISC-V: Don't check text_mutex during stop_machine

[ Upstream commit 2a8db5ec4a28a0fce822d10224db9471a44b6925 ]

We're currently using stop_machine() to update ftrace & kprobes, which
means that the thread that takes text_mutex during may not be the same
as the thread that eventually patches the code.  This isn't actually a
race because the lock is still held (preventing any other concurrent
accesses) and there is only one thread running during stop_machine(),
but it does trigger a lockdep failure.

This patch just elides the lockdep check during stop_machine.

Fixes: c15ac4fd60d5 ("riscv/ftrace: Add dynamic function tracer support")
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Reported-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230303143754.4005217-1-conor.dooley@microchip.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2023-03-17 08:45:13 +01:00

alpha

alpha: fix FEN fault handling

2023-03-11 16:40:04 +01:00

arc

arch: setup PF_IO_WORKER threads like PF_KTHREAD

2023-01-04 11:39:22 +01:00

arm

ARM: dts: spear320-hmi: correct STMPE GPIO compatible

2023-03-11 16:40:13 +01:00

arm64

arm64: efi: Make efi_rt_lock a raw_spinlock