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Date: Fri, 6 Jan 2006 23:28:37 +0100
From: "J.A. Magallon" <jamagallon@able.es>
To: "Linux-Kernel, " <linux-kernel@vger.kernel.org>
Subject: Warnings on void* arithmetic
Message-ID: <20060106232837.03bcacc3@werewolf.auna.net>
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Hi...

Building the nVidia driver gives this couple warnings. I send them just
to see if they are real bugs or not.

include/linux/prefetch.h: In function =E2=80=98prefetch_range=E2=80=99:
include/linux/prefetch.h:62: warning: pointer of type =E2=80=98void *=E2=80=
=99 used in arithmetic

static inline void prefetch_range(void *addr, size_t len)
                                  ^^^^^^
{
#ifdef ARCH_HAS_PREFETCH
    char *cp;
    char *end =3D addr + len; <<<<<<<<<<<<<

    for (cp =3D addr; cp < end; cp +=3D PREFETCH_STRIDE)
        prefetch(cp);
#endif
}


include/asm/io.h: In function =E2=80=98check_signature=E2=80=99:
include/asm/io.h:258: warning: wrong type argument to increment

static inline int check_signature(volatile void __iomem * io_addr,
                                           ^^^^^^^^^^^^^^
    const unsigned char *signature, int length)
{
    int retval =3D 0;
    do {
        if (readb(io_addr) !=3D *signature)
            goto out;
        io_addr++;    <<<<<<<<<<<<<<<<<<<
        signature++;
        length--;
    } while (length);
    retval =3D 1;
out:
    return retval;
}


--
J.A. Magallon <jamagallon()able!es>     \               Software is like se=
x:
werewolf!able!es                         \         It's better when it's fr=
ee
Mandriva Linux release 2006.1 (Cooker) for i586
Linux 2.6.15-jam1 (gcc 4.0.2 (4.0.2-1mdk for Mandriva Linux release 2006.1))

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