The branch main has been updated by manu:
URL:
https://cgit.FreeBSD.org/src/commit/?id=76d93395c522e28cfa329ba57ca235929462412c
commit 76d93395c522e28cfa329ba57ca235929462412c
Author: Emmanuel Vadot <m...@freebsd.org>
AuthorDate: 2022-08-10 06:44:14 +0000
Commit: Emmanuel Vadot <m...@freebsd.org>
CommitDate: 2022-08-18 07:47:04 +0000
linuxkpi: Add __copy_to_user_inatomic and __copy_from_user_inatomic
Reviewed by: bz
Obtained from: drm-kmod
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D36113
---
sys/compat/linuxkpi/common/include/linux/uaccess.h | 25 ++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/sys/compat/linuxkpi/common/include/linux/uaccess.h
b/sys/compat/linuxkpi/common/include/linux/uaccess.h
index c62a94e8e044..3fa16dbcd261 100644
--- a/sys/compat/linuxkpi/common/include/linux/uaccess.h
+++ b/sys/compat/linuxkpi/common/include/linux/uaccess.h
@@ -89,4 +89,29 @@ pagefault_disabled(void)
return ((curthread->td_pflags & TDP_NOFAULTING) != 0);
}
+static inline int
+__copy_to_user_inatomic(void __user *to, const void *from, unsigned n)
+{
+
+ return (copyout_nofault(from, to, n) != 0 ? n : 0);
+}
+#define __copy_to_user_inatomic_nocache(to, from, n) \
+ __copy_to_user_inatomic((to), (from), (n))
+
+static inline unsigned long
+__copy_from_user_inatomic(void *to, const void __user *from,
+ unsigned long n)
+{
+ /*
+ * XXXKIB. Equivalent Linux function is implemented using
+ * MOVNTI for aligned moves. For unaligned head and tail,
+ * normal move is performed. As such, it is not incorrect, if
+ * only somewhat slower, to use normal copyin. All uses
+ * except shmem_pwrite_fast() have the destination mapped WC.
+ */
+ return ((copyin_nofault(__DECONST(void *, from), to, n) != 0 ? n : 0));
+}
+#define __copy_from_user_inatomic_nocache(to, from, n) \
+ __copy_from_user_inatomic((to), (from), (n))
+
#endif /* _LINUXKPI_LINUX_UACCESS_H_ */
