The following commit has been merged into the ras/core branch of tip:
Commit-ID: b4813539d37fa31fed62cdfab7bd2dd8929c5b2e
Gitweb: https://git.kernel.org/tip/b4813539d37fa31fed62cdfab7bd2dd8929c5b2e
Author: Borislav Petkov <bp@xxxxxxx>
AuthorDate: Mon, 01 Nov 2021 16:43:33 +01:00
Committer: Borislav Petkov <bp@xxxxxxx>
CommitterDate: Mon, 13 Dec 2021 14:13:12 +01:00
x86/mce: Mark mce_end() noinstr
It is called by the #MC handler which is noinstr.
Fixes
vmlinux.o: warning: objtool: do_machine_check()+0xbd6: call to memset() leaves .noinstr.text section
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lore.kernel.org/r/20211208111343.8130-9-bp@xxxxxxxxx
---
arch/x86/kernel/cpu/mce/core.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index ec0f7bb..4bdcca8 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1064,10 +1064,13 @@ static int mce_start(int *no_way_out)
* Synchronize between CPUs after main scanning loop.
* This invokes the bulk of the Monarch processing.
*/
-static int mce_end(int order)
+static noinstr int mce_end(int order)
{
- int ret = -1;
u64 timeout = (u64)mca_cfg.monarch_timeout * NSEC_PER_USEC;
+ int ret = -1;
+
+ /* Allow instrumentation around external facilities. */
+ instrumentation_begin();
if (!timeout)
goto reset;
@@ -1108,7 +1111,8 @@ static int mce_end(int order)
/*
* Don't reset anything. That's done by the Monarch.
*/
- return 0;
+ ret = 0;
+ goto out;
}
/*
@@ -1124,6 +1128,10 @@ reset:
* Let others run again.
*/
atomic_set(&mce_executing, 0);
+
+out:
+ instrumentation_end();
+
return ret;
}
|