[PATCH 04/10] xarray: switch to __nonnull_args() macro

[Dmitry Ilvokhin <d@ilvokhin.com>]

Commit 22302af28d3f ("cleanup: Annotate guard constructors with
nonnull") added the macro __nonnull_args() to wrap raw compiler
attribute.

Replace __attribute__((nonnull)) with __nonnull_args() to standardize
nonnull attribute usage across the tree and keep the attribute's quirks
in one place rather than open-coded at every call site.

tools/testing/shared/linux/xarray.h directly includes the kernel's
include/linux/xarray.h, which now uses __nonnull_args(). The macro is
not defined under tools/, breaking test builds.

Define __nonnull_args() in tools/include/linux/compiler.h.

Suggested-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Dmitry Ilvokhin <d@ilvokhin.com>
---
 include/linux/xarray.h         | 4 ++--
 tools/include/linux/compiler.h | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/xarray.h b/include/linux/xarray.h
index be850174e802..cf7f8802da5b 100644
--- a/include/linux/xarray.h
+++ b/include/linux/xarray.h
@@ -361,9 +361,9 @@ bool xa_get_mark(struct xarray *, unsigned long index, xa_mark_t);
 void xa_set_mark(struct xarray *, unsigned long index, xa_mark_t);
 void xa_clear_mark(struct xarray *, unsigned long index, xa_mark_t);
 void *xa_find(struct xarray *xa, unsigned long *index,
-		unsigned long max, xa_mark_t) __attribute__((nonnull(2)));
+		unsigned long max, xa_mark_t) __nonnull_args(2);
 void *xa_find_after(struct xarray *xa, unsigned long *index,
-		unsigned long max, xa_mark_t) __attribute__((nonnull(2)));
+		unsigned long max, xa_mark_t) __nonnull_args(2);
 unsigned int xa_extract(struct xarray *, void **dst, unsigned long start,
 		unsigned long max, unsigned int n, xa_mark_t);
 void xa_destroy(struct xarray *);
diff --git a/tools/include/linux/compiler.h b/tools/include/linux/compiler.h
index 03ecf9086643..fad2c6131a80 100644
--- a/tools/include/linux/compiler.h
+++ b/tools/include/linux/compiler.h
@@ -68,6 +68,10 @@
 #define __naked __attribute__((__naked__))
 #endif
 
+#ifndef __nonnull_args
+#define __nonnull_args(x...) __attribute__((__nonnull__(x)))
+#endif
+
 /* Are two types/vars the same type (ignoring qualifiers)? */
 #ifndef __same_type
 # define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
-- 
2.53.0-Meta