The patch titled
Subject: mm/shmem.c: suppress shift warning
has been added to the -mm mm-unstable branch. Its filename is
mm-shmemc-suppress-shift-warning.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-shmemc-suppress-shift-warning.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm/shmem.c: suppress shift warning
Date: Wed May 25 03:17:09 PM PDT 2022
mm/shmem.c:1948 shmem_getpage_gfp() warn: should '(((1) << 12) / 512) << folio_order(folio)' be a 64 bit type?
On i386, so an unsigned long is 32-bit, but i_blocks is a 64-bit blkcnt_t.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Jessica Clarke <jrtc27@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/shmem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/shmem.c~mm-shmemc-suppress-shift-warning
+++ a/mm/shmem.c
@@ -1945,7 +1945,7 @@ alloc_nohuge:
spin_lock_irq(&info->lock);
info->alloced += folio_nr_pages(folio);
- inode->i_blocks += BLOCKS_PER_PAGE << folio_order(folio);
+ inode->i_blocks += (blkcnt_t)BLOCKS_PER_PAGE << folio_order(folio);
shmem_recalc_inode(inode);
spin_unlock_irq(&info->lock);
alloced = true;
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mm-page_alloc-remotely-drain-per-cpu-lists-checkpatch-fixes.patch
mm-shmemc-suppress-shift-warning.patch
kexec_file-drop-weak-attribute-from-arch_kexec_apply_relocations-fix.patch
linux-next-rejects.patch
linux-next-git-rejects.patch
mm-oom_killc-fix-vm_oom_kill_table-ifdeffery.patch
