Peter Zijlstra 90812dd1f7 x86/extable: Fix ex_handler_msr() print condition ... [ Upstream commit a1a5482a2c ] On Fri, Jun 17, 2022 at 02:08:52PM +0300, Stephane Eranian wrote: > Some changes to the way invalid MSR accesses are reported by the > kernel is causing some problems with messages printed on the > console. > > We have seen several cases of ex_handler_msr() printing invalid MSR > accesses once but the callstack multiple times causing confusion on > the console. > The problem here is that another earlier commit (5.13): > > a358f40600 ("once: implement DO_ONCE_LITE for non-fast-path "do once" functionality") > > Modifies all the pr_*_once() calls to always return true claiming > that no caller is ever checking the return value of the functions. > > This is why we are seeing the callstack printed without the > associated printk() msg. Extract the ONCE_IF(cond) part into __ONCE_LTE_IF() and use that to implement DO_ONCE_LITE_IF() and fix the extable code. Fixes: a358f40600 ("once: implement DO_ONCE_LITE for non-fast-path "do once" functionality") Reported-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Stephane Eranian <eranian@google.com> Link: https://lkml.kernel.org/r/YqyVFsbviKjVGGZ9@worktop.programming.kicks-ass.net Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-17 15:14:20 +02:00
..
acpi	ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported	2022-07-05 20:36:11 +02:00
asm-generic	asm-generic fixes for 5.19, part 2	2022-07-27 09:50:18 -07:00
clocksource	pwm: Changes for v5.19-rc1	2022-06-01 10:49:11 -07:00
crypto
drm	drm/scheduler: Don't kill jobs in interrupt context	2022-07-15 10:09:15 -04:00
dt-bindings	Char / Misc / Other smaller driver subsystem updates for 5.19-rc1	2022-06-03 11:36:34 -07:00
keys	certs: Move load_certificate_list() to be with the asymmetric keys code	2022-06-21 16:05:06 +01:00
kunit
kvm
linux	x86/extable: Fix ex_handler_msr() print condition	2022-08-17 15:14:20 +02:00
math-emu
media
memory
misc
net	netfilter: nf_tables: disallow jump to implicit chain from set element	2022-08-17 15:13:59 +02:00
pcmcia
ras
rdma
scsi
soc
sound	ASoC: Remove unused hw_write_t type	2022-06-24 16:21:41 +01:00
target
trace	io_uring: fix io_uring_cqe_overflow trace format	2022-08-17 15:14:06 +02:00
uapi	asm-generic fixes for 5.19, part 2	2022-07-27 09:50:18 -07:00
ufs
vdso
video	video: of_display_timing.h: include errno.h	2022-07-06 17:16:20 +02:00
xen	arm/xen: Assign xen-grant DMA ops for xen-grant DMA devices	2022-06-06 16:07:30 +02:00