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From: Arnd Bergmann <arnd@kernel.org>
To: linux-arch@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Vineet Gupta <vgupta@synopsys.com>, Arnd Bergmann <arnd@arndb.de>,
	"Richard Russon (FlatCap)" <ldm@flatcap.org>,
	Jens Axboe <axboe@kernel.dk>,
	linux-ntfs-dev@lists.sourceforge.net,
	linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC 08/12] partitions: msdos: fix one-byte get_unaligned()
Date: Sat,  8 May 2021 00:07:53 +0200	[thread overview]
Message-ID: <20210507220813.365382-9-arnd@kernel.org> (raw)
In-Reply-To: <20210507220813.365382-1-arnd@kernel.org>

From: Arnd Bergmann <arnd@arndb.de>

A simplification of get_unaligned() clashes with callers that pass
in a character pointer, causing a harmless warning like:

block/partitions/msdos.c: In function 'msdos_partition':
include/asm-generic/unaligned.h:13:22: warning: 'packed' attribute ignored for field of type 'u8' {aka 'unsigned char'} [-Wattributes]

Remove the get_unaligned() call and just use the byte directly.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 block/partitions/ldm.h   | 2 +-
 block/partitions/msdos.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/partitions/ldm.h b/block/partitions/ldm.h
index d8d6beaa72c4..1a77ff09cc5f 100644
--- a/block/partitions/ldm.h
+++ b/block/partitions/ldm.h
@@ -85,7 +85,7 @@ struct parsed_partitions;
 #define TOC_BITMAP2		"log"		/* bitmaps in the TOCBLOCK. */
 
 /* Borrowed from msdos.c */
-#define SYS_IND(p)		(get_unaligned(&(p)->sys_ind))
+#define SYS_IND(p)		((p)->sys_ind)
 
 struct frag {				/* VBLK Fragment handling */
 	struct list_head list;
diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c
index 8f2fcc080264..d78549d7619d 100644
--- a/block/partitions/msdos.c
+++ b/block/partitions/msdos.c
@@ -38,7 +38,7 @@
  */
 #include <asm/unaligned.h>
 
-#define SYS_IND(p)	get_unaligned(&p->sys_ind)
+#define SYS_IND(p)	(p->sys_ind)
 
 static inline sector_t nr_sects(struct msdos_partition *p)
 {
-- 
2.29.2


  parent reply	other threads:[~2021-05-07 22:11 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-07 22:07 [RFC 0/12] Unify asm/unaligned.h around struct helper Arnd Bergmann
2021-05-07 22:07 ` Arnd Bergmann
2021-05-07 22:07 ` Arnd Bergmann
2021-05-07 22:07 ` [OpenRISC] " Arnd Bergmann
2021-05-07 22:07 ` [RFC 01/12] asm-generic: use asm-generic/unaligned.h for most architectures Arnd Bergmann
2021-05-07 22:07   ` Arnd Bergmann
2021-05-07 22:07   ` Arnd Bergmann
2021-05-07 23:02   ` Thomas Gleixner
2021-05-07 23:02     ` Thomas Gleixner
2021-05-07 23:02     ` Thomas Gleixner
2021-05-10 10:16   ` Geert Uytterhoeven
2021-05-10 10:16     ` Geert Uytterhoeven
2021-05-10 10:16     ` Geert Uytterhoeven
2021-05-10 13:12     ` Arnd Bergmann
2021-05-10 13:12       ` Arnd Bergmann
2021-05-10 13:12       ` Arnd Bergmann
2021-05-07 22:07 ` [RFC 02/12] openrisc: always use unaligned-struct header Arnd Bergmann
2021-05-07 22:07   ` [OpenRISC] " Arnd Bergmann
2021-05-07 23:02   ` Stafford Horne
2021-05-07 23:02     ` [OpenRISC] " Stafford Horne
2021-05-08 11:42   ` David Laight
2021-05-08 11:42     ` [OpenRISC] " David Laight
2021-05-07 22:07 ` [RFC 03/12] sh: remove unaligned access for sh4a Arnd Bergmann
2021-05-10 21:11   ` Rob Landley
2021-05-07 22:07 ` [RFC 04/12] m68k: select CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS Arnd Bergmann
2021-05-10 10:18   ` Geert Uytterhoeven
2021-05-07 22:07 ` [RFC 05/12] powerpc: use linux/unaligned/le_struct.h on LE power7 Arnd Bergmann
2021-05-07 22:07   ` Arnd Bergmann
2021-05-07 22:07 ` [RFC 06/12] asm-generic: unaligned: remove byteshift helpers Arnd Bergmann
2021-05-07 22:07   ` Arnd Bergmann
2021-05-08 11:38   ` Arnd Bergmann
2021-05-08 11:38     ` Arnd Bergmann
2021-05-07 22:07 ` [RFC 07/12] asm-generic: unaligned always use struct helpers Arnd Bergmann
2021-05-07 22:07   ` Arnd Bergmann
2021-05-07 22:07 ` Arnd Bergmann [this message]
2021-05-07 22:07 ` [RFC 09/12] apparmor: use get_unaligned() only for multi-byte words Arnd Bergmann
2021-05-10  8:17   ` John Johansen
2021-05-07 22:07 ` [RFC 10/12] mwifiex: re-fix for unaligned accesses Arnd Bergmann
2021-05-07 22:07 ` [RFC 11/12] netpoll: avoid put_unaligned() on single character Arnd Bergmann
2021-05-07 22:07 ` [RFC 12/12] asm-generic: simplify asm/unaligned.h Arnd Bergmann
2021-05-07 23:54   ` Linus Torvalds
2021-05-08  9:28     ` Arnd Bergmann
2021-05-08 15:23       ` Linus Torvalds
2021-05-08 11:03   ` David Laight
2021-05-08 14:18     ` David Laight
2021-05-10  6:39   ` Geert Uytterhoeven
2021-05-07 22:07 ` [RFC 0/12] Unify asm/unaligned.h around struct helper Arnd Bergmann
2021-05-07 22:07   ` Arnd Bergmann
2021-05-07 22:07   ` Arnd Bergmann
2021-05-07 22:07   ` [OpenRISC] " Arnd Bergmann

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