Re: [axboe:for-7.0/block 19/138] block/blk-crypto-fallback.c:154:17: sparse: sparse: cast from restricted blk_status_t

Hi,

Le 01/06/2026 à 17:29, Christoph Hellwig a écrit :

I think powerpc really need to pick the tricks from other architectures
to make cmpxchg work on __bitwise fields.

Thanks,

Should be fixed by 
https://lore.kernel.org/all/289a7ffac9cb5b6d26a57fdc26605bf725285302.1786608980.git.chleroy@kernel.org/ (local)

Based on commit 212dd8477653 ("arm64: Silence sparse warnings caused by 
the type casting in (cmp)xchg")

Christophe

On Mon, Jun 01, 2026 at 11:26:16PM +0800, kernel test robot wrote:

quoted

tree:   https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Faxboe%2Flinux.git&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7Cb09ed76c517f4ac2a96a08debff29913%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639159245835365955%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=SCrQIL52YejLyMbT487%2Fu4y7bDdqD3W0NISJGASlqnI%3D&reserved=0 for-7.0/block
head:   72f4d6fca699a1e35b39c5e5dacac2926d254135
commit: b37fbce460ad60b0c4449c1c7566cf24f3016713 [19/138] blk-crypto: optimize bio splitting in blk_crypto_fallback_encrypt_bio
config: powerpc64-randconfig-r111-20260601 (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdownload.01.org%2F0day-ci%2Farchive%2F20260601%2F202606012339.rZAl6Xq8-lkp%40intel.com%2Fconfig&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7Cb09ed76c517f4ac2a96a08debff29913%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639159245835742509%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=mcTjhCA7fN2FQAsYEiRRY3xTOyBg%2BNJxAwMqeSERPG4%3D&reserved=0)
compiler: powerpc64-linux-gcc (GCC) 8.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdownload.01.org%2F0day-ci%2Farchive%2F20260601%2F202606012339.rZAl6Xq8-lkp%40intel.com%2Freproduce&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7Cb09ed76c517f4ac2a96a08debff29913%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639159245835767299%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=3IobnZTPyXIEKog3PvyDf%2Bti4W%2F4jFM8O5QZG%2FVn%2Bkw%3D&reserved=0)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot [off-list ref]
| Closes: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Foe-kbuild-all%2F202606012339.rZAl6Xq8-lkp%40intel.com%2F&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7Cb09ed76c517f4ac2a96a08debff29913%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C639159245835785008%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=dkHYbj0M7dRIfeyg8uLlJgQlMYbYi91eHIOx5FZOpJ0%3D&reserved=0

sparse warnings: (new ones prefixed by >>)

quoted

quoted

block/blk-crypto-fallback.c:154:17: sparse: sparse: cast from restricted blk_status_t
block/blk-crypto-fallback.c:154:17: sparse: sparse: cast from restricted blk_status_t

    block/blk-crypto-fallback.c:154:17: sparse: sparse: cast to restricted blk_status_t

vim +154 block/blk-crypto-fallback.c

    143	
    144	static void blk_crypto_fallback_encrypt_endio(struct bio *enc_bio)
    145	{
    146		struct bio *src_bio = enc_bio->bi_private;
    147		int i;
    148	
    149		for (i = 0; i < enc_bio->bi_vcnt; i++)
    150			mempool_free(enc_bio->bi_io_vec[i].bv_page,
    151				     blk_crypto_bounce_page_pool);
    152	
    153		if (enc_bio->bi_status)
  > 154			cmpxchg(&src_bio->bi_status, 0, enc_bio->bi_status);
    155	
    156		bio_put(enc_bio);
    157		bio_endio(src_bio);
    158	}
    159	

--
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