linux-kernel - [PATCH 03/16] tools/include: Add _RET_IP

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Message-Id: <5baa036aadb6436c7c36589ce591baaf827aec0b.1643206612.git.karolinadrobnik@gmail.com>
Date:   Thu, 27 Jan 2022 14:21:21 +0100
From:   Karolina Drobnik <karolinadrobnik@...il.com>
To:     linux-mm@...ck.org
Cc:     akpm@...ux-foundation.org, mike.rapoport@...il.com,
        linux-kernel@...r.kernel.org,
        Karolina Drobnik <karolinadrobnik@...il.com>
Subject: [PATCH 03/16] tools/include: Add _RET_IP_ and math definitions to kernel.h

Add max_t, min_t and clamp functions, together with _RET_IP_
definition, so they can be used in testing.

Signed-off-by: Karolina Drobnik <karolinadrobnik@...il.com>
---
 tools/include/linux/kernel.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h
index 9701e8307db0..4b0673bf52c2 100644
--- a/tools/include/linux/kernel.h
+++ b/tools/include/linux/kernel.h
@@ -15,6 +15,8 @@
 #define UINT_MAX	(~0U)
 #endif
 
+#define _RET_IP_		((unsigned long)__builtin_return_address(0))
+
 #define PERF_ALIGN(x, a)	__PERF_ALIGN_MASK(x, (typeof(x))(a)-1)
 #define __PERF_ALIGN_MASK(x, mask)	(((x)+(mask))&~(mask))
 
@@ -51,6 +53,10 @@
 	_min1 < _min2 ? _min1 : _min2; })
 #endif
 
+#define max_t(type, x, y)	max((type)x, (type)y)
+#define min_t(type, x, y)	min((type)x, (type)y)
+#define clamp(val, lo, hi)	min((typeof(val))max(val, lo), hi)
+
 #ifndef BUG_ON
 #ifdef NDEBUG
 #define BUG_ON(cond) do { if (cond) {} } while (0)
-- 
2.30.2