Re: [PATCH] hugetlb: Fix clang compilation warning

[Mike Kravetz]

On 10/16/19 7:23 AM, Vincenzo Frascino wrote:
> Building the kernel with a recent version of clang I noticed the warning
> below:
> 
> mm/hugetlb.c:4055:40: warning: expression does not compute the number of
> elements in this array; element type is 'unsigned long', not 'u32'
> (aka 'unsigned int') [-Wsizeof-array-div]
>         hash = jhash2((u32 *)&key, sizeof(key)/sizeof(u32), 0);
>                                           ~~~ ^
> mm/hugetlb.c:4049:16: note: array 'key' declared here
>         unsigned long key[2];
>                       ^
> mm/hugetlb.c:4055:40: note: place parentheses around the 'sizeof(u32)'
> expression to silence this warning
>         hash = jhash2((u32 *)&key, sizeof(key)/sizeof(u32), 0);
>                                               ^  CC      fs/ext4/ialloc.o
> 
> Fix the warning adding parentheses around the sizeof(u32) expression.
> 
> Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>

Thanks,

However, this is already addressed in Andrew's tree.
https://ozlabs.org/~akpm/mmotm/broken-out/hugetlbfs-hugetlb_fault_mutex_hash-cleanup.patch

-- 
Mike Kravetz