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mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines 

commit d9592025000b3cf26c742f3505da7b83aedc26d5 upstream.

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>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yang Shi 2024-07-12 08:58:55 -07:00 committed by Greg Kroah-Hartman
parent 6ea9aa8d97
commit a5c399fe43
1 changed files with 1 additions and 1 deletions
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2
mm/huge_memory.c
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@ -602,7 +602,7 @@ static unsigned long __thp_get_unmapped_area(struct file *filp,
loff_t off_align = round_up(off, size);
unsigned long len_pad, ret;
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)