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ARM: 8584/1: floppy: avoid gcc-6 warning

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commit dd665be0e243873343a28e18f9f345927b658daf upstream.

gcc-6.0 warns about comparisons between two identical expressions,
which is what we get in the floppy driver when writing to the FD_DOR
register:

drivers/block/floppy.c: In function 'set_dor':
drivers/block/floppy.c:810:44: error: self-comparison always evaluates to true [-Werror=tautological-compare]
   fd_outb(newdor, FD_DOR);

It would be nice to use a static inline function instead of the
macro, to avoid the warning, but we cannot do that because the
FD_DOR definition is incomplete at this point.

Adding a cast to (u32) is a harmless way to shut up the warning,
just not very nice.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2016-07-01 18:02:22 +01:00 committed by Greg Kroah-Hartman
parent f0b13816ad
commit 58fca2f156
1 changed files with 1 additions and 1 deletions
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2
arch/arm/include/asm/floppy.h
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@ -17,7 +17,7 @@
#define fd_outb(val,port) \
do { \
if ((port) == FD_DOR) \
if ((port) == (u32)FD_DOR) \
fd_setdor((val)); \
else \
outb((val),(port)); \