On Jan 29, 2021, at 11:58 AM, Vinicius Tinti <[email protected]> wrote: > > By enabling -Wunreachable-code-aggressive on Clang the following code > paths are unreachable. > > Commit dd73b5d5cb67 ("ext4: convert dx_probe() to use the ERR_PTR > convention") > Commit ac27a0ec112a ("[PATCH] ext4: initial copy of files from ext3") > > Clang warns: > > fs/ext4/namei.c:831:17: warning: code will never be executed > [-Wunreachable-code] > unsigned n = count - 1; > ^~~~~ > fs/ext4/namei.c:830:7: note: silence by adding parentheses to mark code as > explicitly dead > if (0) { // linear search cross check > ^ > /* DISABLES CODE */ ( ) > > Signed-off-by: Vinicius Tinti <[email protected]> > --- > fs/ext4/namei.c | 15 --------------- > 1 file changed, 15 deletions(-) > > diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c > index cf652ba3e74d..1f64dbd7237b 100644 > --- a/fs/ext4/namei.c > +++ b/fs/ext4/namei.c > @@ -827,21 +827,6 @@ dx_probe(struct ext4_filename *fname, struct inode *dir, > p = m + 1; > } > > - if (0) { // linear search cross check
I would rather put this block under "#ifdef DX_DEBUG" so that it is available
in the future for debugging problems with hashed directories.
> - unsigned n = count - 1;
> - at = entries;
> - while (n--)
> - {
> - dxtrace(printk(KERN_CONT ","));
> - if (dx_get_hash(++at) > hash)
> - {
> - at--;
> - break;
> - }
> - }
> - ASSERT(at == p - 1);
> - }
> -
> at = p - 1;
> dxtrace(printk(KERN_CONT " %x->%u\n",
> at == entries ? 0 : dx_get_hash(at),
> --
> 2.25.1
>
Cheers, Andreas
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