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authorMarco Elver <elver@google.com>2020-04-24 17:47:29 +0200
committerPaul E. McKenney <paulmck@kernel.org>2020-05-06 19:58:46 +0200
commit19acd03d95dad1f50d06f28179a1866fca431fed (patch)
tree1f451d663d7d1898ab8dca276e893fd880999d00 /kernel/kcsan
parentcheckpatch: Warn about data_race() without comment (diff)
downloadlinux-19acd03d95dad1f50d06f28179a1866fca431fed.tar.xz
linux-19acd03d95dad1f50d06f28179a1866fca431fed.zip
kcsan: Add __kcsan_{enable,disable}_current() variants
The __kcsan_{enable,disable}_current() variants only call into KCSAN if KCSAN is enabled for the current compilation unit. Note: This is typically not what we want, as we usually want to ensure that even calls into other functions still have KCSAN disabled. These variants may safely be used in header files that are shared between regular kernel code and code that does not link the KCSAN runtime. Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/kcsan')
-rw-r--r--kernel/kcsan/core.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c
index a572aae61b98..a73a66cf79df 100644
--- a/kernel/kcsan/core.c
+++ b/kernel/kcsan/core.c
@@ -625,6 +625,13 @@ void kcsan_enable_current(void)
}
EXPORT_SYMBOL(kcsan_enable_current);
+void kcsan_enable_current_nowarn(void)
+{
+ if (get_ctx()->disable_count-- == 0)
+ kcsan_disable_current();
+}
+EXPORT_SYMBOL(kcsan_enable_current_nowarn);
+
void kcsan_nestable_atomic_begin(void)
{
/*