王贇 ce5e48036c ftrace: disable preemption when recursion locked ... As the documentation explained, ftrace_test_recursion_trylock() and ftrace_test_recursion_unlock() were supposed to disable and enable preemption properly, however currently this work is done outside of the function, which could be missing by mistake. And since the internal using of trace_test_and_set_recursion() and trace_clear_recursion() also require preemption disabled, we can just merge the logical. This patch will make sure the preemption has been disabled when trace_test_and_set_recursion() return bit >= 0, and trace_clear_recursion() will enable the preemption if previously enabled. Link: https://lkml.kernel.org/r/13bde807-779c-aa4c-0672-20515ae365ea@linux.alibaba.com CC: Petr Mladek <pmladek@suse.com> Cc: Guo Ren <guoren@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: Joe Lawrence <joe.lawrence@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Jisheng Zhang <jszhang@kernel.org> CC: Steven Rostedt <rostedt@goodmis.org> CC: Miroslav Benes <mbenes@suse.cz> Reported-by: Abaci <abaci@linux.alibaba.com> Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Michael Wang <yun.wang@linux.alibaba.com> [ Removed extra line in comment - SDR ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2021-10-27 11:21:49 -04:00
..
boot	riscv: dts: microchip: mpfs-icicle: Fix serial console	2021-09-10 23:58:19 -07:00
configs	riscv: defconfig: enable NLS_CODEPAGE_437, NLS_ISO8859_1	2021-09-10 21:31:12 -07:00
errata	riscv: skip errata_cip_453.o if CONFIG_ERRATA_SIFIVE_CIP_453 is disabled	2021-06-01 21:16:41 -07:00
include	kprobes: treewide: Make it harder to refer kretprobe_trampoline directly	2021-09-30 21:24:06 -04:00
kernel	ftrace: disable preemption when recursion locked	2021-10-27 11:21:49 -04:00
lib	riscv: __asm_copy_to-from_user: Fix: Typos in comments	2021-07-23 17:49:12 -07:00
mm	RISC-V Patches for the 5.15 Merge Window, Part 1	2021-09-05 11:31:23 -07:00
net	bpf: Introduce BPF nospec instruction for mitigating Spectre v4	2021-07-29 00:20:56 +02:00
Kbuild	riscv: Allow device trees to be built into the kernel	2020-05-18 11:38:05 -07:00
Kconfig	Merge branch 'gcc-min-version-5.1' (make gcc-5.1 the minimum version)	2021-09-13 10:43:04 -07:00
Kconfig.debug	RISC-V: Remove EARLY_PRINTK support	2018-12-17 10:23:46 -08:00
Kconfig.erratas	riscv: enable SiFive errata CIP-453 and CIP-1200 Kconfig only if CONFIG_64BIT=y	2021-05-06 09:40:13 -07:00
Kconfig.socs	riscv: sifive: fix Kconfig errata warning	2021-06-12 17:20:50 -07:00
Makefile	riscv: move the (z)install rules to arch/riscv/Makefile	2021-09-10 23:08:26 -07:00