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Jackman wrote: > As pointed out by Vlastimil in [0], my proposal for __GFP_UNMAPPED is > probably not needed for 32-bit. This offers a way out of the GFP flag > scarcity so in preparation for this, flip gfp_t to be 64-bit on 64-bit > machines, while leaving it 32-bit on 32-bit machines. > > For mm-internal code that prints raw GFP flags as hex, this just update= s > the format specifier to %lx. Presumably developers have a reason for > wanting to see the whole flags word as a number in the log. For printks= > outside of mm/, I assume they are only using %x because the authors > didn't know about %pGg, so they are converted to the latter as prep > patches. I think these %lx -> %pGg patches can be merged. They are nice cleanups. Thank you for doing that. Feel free to add Reviewed-by: Zi Yan to the first 4 patc= hes. (I did not put the tag in a newline, so that b4 will not mistakenly take it for the whole series) For patch 5, I will wait until you address the feedback from Vlastimil and Matthew. > > Stuff I've done to try and find issues with this: > > - Built x86 allmodconfig and arm64 defconfig. Hopefully the 0-day bot > will alert me to the important builds I'm missing (I briefly tried to= > build s390 and sparc64 but ran into tooling issues and gave up). > > - Ran some selftests on a x86 VM. > > - Poked around at stuff that refers to ___GFP_LAST_BIT to see if > anything looks wrong. > > - Ran this Coccinelle script to look for explicit casts to plain int: > > --- > virtual report > > @r@ > gfp_t x; > position p; > @@ > > ( > (unsigned int)x@p > | > (int)x@p > ) > > @script:python depends on report@ > p << r.p; > @@ > msg =3D "WARNING: Explicit integer cast of gfp_t" > coccilib.report.print_report(p[0], msg) > --- > > Obviously this series doesn't "do anything" so maybe it doesn't make > sense to merge it unless it goes in alongside __GFP_UNMAPPED, but it > does seem to make sense to review it independently so I'm posting it as= > a separate series. > > [0] https://lore.kernel.org/all/6206d021-e6c2-4899-b426-cacd71ebd5ef@ke= rnel.org/ > > To: Andrew Morton > To: Michal Hocko > To: David Rientjes > To: Shakeel Butt > To: Vlastimil Babka > To: Suren Baghdasaryan > To: Brendan Jackman > To: Johannes Weiner > To: Zi Yan > To: Harry Yoo > To: Hao Li > To: Christoph Lameter > To: Roman Gushchin > To: Uladzislau Rezki > Cc: linux-kernel@vger.kernel.org > Cc: linux-mm@kvack.org > > Signed-off-by: Brendan Jackman > > --- > Brendan Jackman (5): > drm/managed: Use special gfp_t format specifier > iwlegacy: 3945-mac: Use special gfp_t format specifier > mm/kfence: Use special gfp_t format specifier > net/rds: Use special gfp_t format specifier > mm: Change gfp_t to unsigned long > > drivers/gpu/drm/drm_managed.c | 4 ++-- > drivers/net/wireless/intel/iwlegacy/3945-mac.c | 4 ++-- > include/linux/types.h | 2 +- > lib/test_lockup.c | 2 +- > mm/kfence/kfence_test.c | 2 +- > mm/oom_kill.c | 2 +- > mm/page_alloc.c | 5 ++++- > mm/page_owner.c | 4 ++-- > mm/slab_common.c | 2 +- > mm/slub.c | 2 +- > mm/vmalloc.c | 2 +- > net/rds/tcp_recv.c | 2 +- > 12 files changed, 18 insertions(+), 15 deletions(-) > --- > base-commit: 8a30aeb0d1b4e4aaf7f7bae72f20f2ae75385ccb > change-id: 20260319-gfp64-7a970a80ba4e > > Best regards, > -- = > Brendan Jackman Best Regards, Yan, Zi