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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 7/8] include: Import min_not_zero() macro from Linux
Date: Mon, 11 Feb 2019 22:40:21 -0800	[thread overview]
Message-ID: <20190212064022.26154-8-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190212064022.26154-1-andrew.smirnov@gmail.com>

Import min_not_zero() macro from Linux used by some kernel code.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 include/linux/kernel.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index ee0b48e08..849c079d0 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -135,6 +135,16 @@ extern long long simple_strtoll(const char *,char **,unsigned int);
 	_max1 > _max2 ? (_max1 > _max3 ? _max1 : _max3) :	\
 		(_max2 > _max3 ? _max2 : _max3); })
 
+/**
+ * min_not_zero - return the minimum that is _not_ zero, unless both are zero
+ * @x: value1
+ * @y: value2
+ */
+#define min_not_zero(x, y) ({			\
+	typeof(x) __x = (x);			\
+	typeof(y) __y = (y);			\
+	__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
+
 /**
  * clamp - return a value clamped to a given range with strict typechecking
  * @val: current value
-- 
2.20.1


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  parent reply	other threads:[~2019-02-12  6:40 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-12  6:40 [PATCH 0/8] NVME support Andrey Smirnov
2019-02-12  6:40 ` [PATCH 1/8] PCI: Fix to_pci_dev() macro Andrey Smirnov
2019-02-12  6:40 ` [PATCH 2/8] PCI: Introduce device_pci_driver() Andrey Smirnov
2019-02-12  6:40 ` [PATCH 3/8] drivers: Make use of device_pci_driver() Andrey Smirnov
2019-02-12  6:40 ` [PATCH 4/8] include: Sync up pci_ids.h with 4.20-rc1 Andrey Smirnov
2019-02-12  6:40 ` [PATCH 5/8] include: Add definitnion for HZ Andrey Smirnov
2019-02-12  6:40 ` [PATCH 6/8] include: Import uuid.h for Linux Andrey Smirnov
2019-02-12  6:40 ` Andrey Smirnov [this message]
2019-02-12  6:40 ` [PATCH 8/8] drivers: Import a very basic NVME implementation from Linux Andrey Smirnov
2019-02-18  8:24 ` [PATCH 0/8] NVME support Sascha Hauer

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