Merge tag 'mm-nonmm-stable-2023-02-20-15-29' of git://git.kernel.org/pub/scm/linux...

[thirdparty/linux.git] / include / linux / util_macros.h

diff --git a/include/linux/util_macros.h b/include/linux/util_macros.h
index b641ec00be3e7a74f961c4d0c9a7e2b075f1dde7..6bb460c3e818b3508c09a745113704d514c95909 100644 (file)
--- a/include/linux/util_macros.h
+++ b/include/linux/util_macros.h
@@ -40,4 +40,16 @@
  */
 #define find_closest_descending(x, a, as) __find_closest(x, a, as, >=)
 
+/**
+ * is_insidevar - check if the @ptr points inside the @var memory range.
+ * @ptr:       the pointer to a memory address.
+ * @var:       the variable which address and size identify the memory range.
+ *
+ * Evaluates to true if the address in @ptr lies within the memory
+ * range allocated to @var.
+ */
+#define is_insidevar(ptr, var)                                         \
+       ((uintptr_t)(ptr) >= (uintptr_t)(var) &&                        \
+        (uintptr_t)(ptr) <  (uintptr_t)(var) + sizeof(var))
+
 #endif