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authorYang Shi <yang@os.amperecomputing.com>2024-07-12 08:58:55 -0700
committerAndrew Morton <akpm@linux-foundation.org>2024-07-26 14:33:09 -0700
commitd9592025000b3cf26c742f3505da7b83aedc26d5 (patch)
tree1a12153de00dc1710e21eb8f827a368afc9c4758 /mm
parent4cd7ba16a0afb36550eed7690e73d3e7a743fa96 (diff)
downloadlwn-d9592025000b3cf26c742f3505da7b83aedc26d5.tar.gz
lwn-d9592025000b3cf26c742f3505da7b83aedc26d5.zip
mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines
Yves-Alexis Perez reported commit 4ef9ad19e176 ("mm: huge_memory: don't force huge page alignment on 32 bit") didn't work for x86_32 [1]. It is because x86_32 uses CONFIG_X86_32 instead of CONFIG_32BIT. !CONFIG_64BIT should cover all 32 bit machines. [1] https://lore.kernel.org/linux-mm/CAHbLzkr1LwH3pcTgM+aGQ31ip2bKqiqEQ8=FQB+t2c3dhNKNHA@mail.gmail.com/ Link: https://lkml.kernel.org/r/20240712155855.1130330-1-yang@os.amperecomputing.com Fixes: 4ef9ad19e176 ("mm: huge_memory: don't force huge page alignment on 32 bit") Signed-off-by: Yang Shi <yang@os.amperecomputing.com> Reported-by: Yves-Alexis Perez <corsac@debian.org> Tested-by: Yves-Alexis Perez <corsac@debian.org> Acked-by: David Hildenbrand <david@redhat.com> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Christoph Lameter <cl@linux.com> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Salvatore Bonaccorso <carnil@debian.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: <stable@vger.kernel.org> [6.8+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/huge_memory.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index f9696c94e211..04b72912035d 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -877,7 +877,7 @@ static unsigned long __thp_get_unmapped_area(struct file *filp,
loff_t off_align = round_up(off, size);
unsigned long len_pad, ret, off_sub;
- if (IS_ENABLED(CONFIG_32BIT) || in_compat_syscall())
+ if (!IS_ENABLED(CONFIG_64BIT) || in_compat_syscall())
return 0;
if (off_end <= off_align || (off_end - off_align) < size)