hexagon: fix using plain integer as NULL pointer warning in cmpxchg

Sparse reports

    net/ipv4/inet_diag.c:1511:17: sparse: sparse: Using plain integer as NULL pointer

Due to this code calling cmpxchg on a non-integer type
struct inet_diag_handler *

    return !cmpxchg((const struct inet_diag_handler**)&inet_diag_table[type],
                    NULL, h) ? 0 : -EEXIST;

While hexagon's cmpxchg assigns an integer value to a variable of this
type.

    __typeof__(*(ptr)) __oldval = 0;

Update this assignment to cast 0 to the correct type.

The original issue is easily reproduced at head with the below block,
and is absent after this change.

    make LLVM=1 ARCH=hexagon defconfig
    make C=1 LLVM=1 ARCH=hexagon net/ipv4/inet_diag.o

Fixes: 99a70aa051d2 ("Hexagon: Add processor and system headers")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Willem de Bruijn <[email protected]>
Tested-by: Christian Gmeiner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Brian Cain <[email protected]>
Signed-off-by: Brian Cain <[email protected]>

0 files changed, 0 insertions, 0 deletions