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Force the setting of bit 7 in the sysmouse packet byte 1 to be unsigned.

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Clang complains about the shift of (1 << 7) into a int8_t changing the value:

warning: implicit conversion from 'int' to 'int8_t' (aka 'signed char') changes
value from 128 to -128 [-Wconstant-conversion]

Squash this warning by forcing clang to see it as an unsigned bit.

This seems odd, given that it's still a conversion of 128->-128, but I'm
guessing the explicit unsigned attribute notifies clang that sign really doesn't
matter in this case.

Reported by:	Mark Millard <markmi AT dsl-only DOT net>
MFC after:	2 weeks
This commit is contained in:
Justin Hibbits 2017-01-30 02:32:33 +00:00
parent 7f9218ef00
commit 605e7281dc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=312977
1 changed files with 1 additions and 1 deletions
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2
sys/dev/adb/adb_mouse.c
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@ -520,7 +520,7 @@ ams_read(struct cdev *dev, struct uio *uio, int flag)
}
}
sc->packet[0] = 1 << 7;
sc->packet[0] = 1U << 7;
sc->packet[0] |= (!(sc->buttons & 1)) << 2;
sc->packet[0] |= (!(sc->buttons & 4)) << 1;
sc->packet[0] |= (!(sc->buttons & 2));