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-rw-r--r--fs/bcachefs/mean_and_variance.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/bcachefs/mean_and_variance.h b/fs/bcachefs/mean_and_variance.h
index 056e797383..64df11ab42 100644
--- a/fs/bcachefs/mean_and_variance.h
+++ b/fs/bcachefs/mean_and_variance.h
@@ -12,6 +12,9 @@
/*
* u128_u: u128 user mode, because not all architectures support a real int128
* type
+ *
+ * We don't use this version in userspace, because in userspace we link with
+ * Rust and rustc has issues with u128.
*/
#if defined(__SIZEOF_INT128__) && defined(__KERNEL__) && !defined(CONFIG_PARISC)