On 8/2/2023 11:13 PM, Matthew Wilcox (Oracle) wrote:
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 798c6963909f..83aebc244cba 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -3,6 +3,7 @@
#define _LINUX_MINMAX_H
#include <linux/const.h>
+#include <linux/types.h>
/*
* min()/max()/clamp() macros must accomplish three things:
@@ -222,6 +223,32 @@
*/
#define clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)
+static inline bool in_range64(u64 val, u64 start, u64 len)
+{
+ return (val - start) < len;
+}
+
+static inline bool in_range32(u32 val, u32 start, u32 len)
+{
+ return (val - start) < len;
+}
+
I think these two functions return wrong result if val is smaller than
start and len is big enough.
