Nick Desaulniers 1874d3d6ad tracepoint: Mark __tracepoint_string's __used ... commit f3751ad011 upstream. __tracepoint_string's have their string data stored in .rodata, and an address to that data stored in the "__tracepoint_str" section. Functions that refer to those strings refer to the symbol of the address. Compiler optimization can replace those address references with references directly to the string data. If the address doesn't appear to have other uses, then it appears dead to the compiler and is removed. This can break the /tracing/printk_formats sysfs node which iterates the addresses stored in the "__tracepoint_str" section. Like other strings stored in custom sections in this header, mark these __used to inform the compiler that there are other non-obvious users of the address, so they should still be emitted. Link: https://lkml.kernel.org/r/20200730224555.2142154-2-ndesaulniers@google.com Cc: Ingo Molnar <mingo@redhat.com> Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Cc: stable@vger.kernel.org Fixes: 102c9323c3 ("tracing: Add __tracepoint_string() to export string pointers") Reported-by: Tim Murray <timmurray@google.com> Reported-by: Simon MacMullen <simonmacm@google.com> Suggested-by: Greg Hackmann <ghackmann@google.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-08-19 08:14:47 +02:00
..
acpi	x86: ACPI: fix CPU hotplug deadlock	2020-04-23 10:30:20 +02:00
asm-generic	x86, vmlinux.lds: Page-align end of ..page_aligned sections	2020-07-29 10:16:58 +02:00
clocksource
crypto	crypto: af_alg - fix use-after-free in af_alg_accept() due to bh_lock_sock()	2020-07-09 09:37:10 +02:00
drm	drm/panel: make drm_panel.h self-contained	2020-01-27 14:51:01 +01:00
dt-bindings	dt-bindings: reset: meson8b: fix duplicate reset IDs	2020-01-23 08:21:26 +01:00
keys	KEYS: Don't write out to userspace while holding key semaphore	2020-04-23 10:30:24 +02:00
kvm	KVM: arm/arm64: Sync ICH_VMCR_EL2 back when about to block	2019-08-25 10:47:59 +02:00
linux	tracepoint: Mark __tracepoint_string's __used	2020-08-19 08:14:47 +02:00
math-emu	math-emu/soft-fp.h: (_FP_ROUND_ZERO) cast 0 to void to fix warning	2019-12-13 08:51:34 +01:00
media	media: v4l2-device.h: Explicitly compare grp{id,mask} to zero in v4l2_device macros	2020-02-24 08:34:41 +01:00
memory
misc
net	ipv6: fix memory leaks on IPV6_ADDRFORM path	2020-08-11 15:32:34 +02:00
pcmcia
ras
rdma	RDMA/core: Fix double destruction of uobject	2020-06-03 08:19:43 +02:00
scsi	scsi: Revert "target: iscsi: Wait for all commands to finish before freeing a session"	2020-02-28 16:38:58 +01:00
soc	soc/tegra: pmc: Fix pad voltage configuration for Tegra186	2019-11-20 18:45:24 +01:00
sound	ASoC: rt5670: Add new gpio1_is_ext_spk_en quirk and enable it on the Lenovo Miix 2 10	2020-07-29 10:16:58 +02:00
target	scsi: target: fix hang when multiple threads try to destroy the same iscsi session	2020-04-21 09:03:11 +02:00
trace	rxrpc: Fix trace string	2020-07-22 09:32:13 +02:00
uapi	wireless: Use offsetof instead of custom macro.	2020-08-05 10:06:01 +02:00
video
xen