linux-kernel - [PATCH v1 1/8] lib/uuid: Introduce uuid_{be|le}_cmp

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Date:   Fri, 21 Apr 2017 17:46:38 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        alsa-devel@...a-project.org, linux-input@...r.kernel.org,
        kvm@...r.kernel.org, devel@...uxdriverproject.org,
        linux-efi@...r.kernel.org, linux-acpi@...r.kernel.org
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Vinod Koul <vinod.koul@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Kirti Wankhede <kwankhede@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: [PATCH v1 1/8] lib/uuid: Introduce uuid_{be|le}_cmp_p{p}() helpers

New helpers take pointers to uuid_{be|le} as parameters.

When using them on a raw data we don't need to do an ugly dereference
and, in some cases, a type casting.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Vinod Koul <vinod.koul@...el.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc: Kirti Wankhede <kwankhede@...dia.com>
Cc: Alex Williamson <alex.williamson@...hat.com>
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>
Cc: Haiyang Zhang <haiyangz@...rosoft.com>
Cc: Stephen Hemminger <sthemmin@...rosoft.com>
Cc: Tomas Winkler <tomas.winkler@...el.com>
Cc: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 include/linux/uuid.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/linux/uuid.h b/include/linux/uuid.h
index 4dff73a89758..45312cb5ac65 100644
--- a/include/linux/uuid.h
+++ b/include/linux/uuid.h
@@ -58,6 +58,26 @@ static inline int uuid_be_cmp(const uuid_be u1, const uuid_be u2)
 	return memcmp(&u1, &u2, sizeof(uuid_be));
 }
 
+static inline int uuid_le_cmp_p(const uuid_le *pu1, const uuid_le u2)
+{
+	return memcmp(pu1, &u2, sizeof(uuid_le));
+}
+
+static inline int uuid_be_cmp_p(const uuid_be *pu1, const uuid_be u2)
+{
+	return memcmp(pu1, &u2, sizeof(uuid_be));
+}
+
+static inline int uuid_le_cmp_pp(const uuid_le *pu1, const uuid_le *pu2)
+{
+	return memcmp(pu1, pu2, sizeof(uuid_le));
+}
+
+static inline int uuid_be_cmp_pp(const uuid_be *pu1, const uuid_be *pu2)
+{
+	return memcmp(pu1, pu2, sizeof(uuid_be));
+}
+
 void generate_random_uuid(unsigned char uuid[16]);
 
 extern void uuid_le_gen(uuid_le *u);
-- 
2.11.0