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

[Yang Shi]

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@xxxxxxxxxxxxxx/

Fixes: 4ef9ad19e176 ("mm: huge_memory: don't force huge page alignment on 32 bit")
Reported-by: Yves-Alexis Perez <corsac@xxxxxxxxxx>
Tested-By: Yves-Alexis Perez <corsac@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>    [6.8+]
Signed-off-by: Yang Shi <yang@xxxxxxxxxxxxxxxxxxxxxx>
---
 mm/huge_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 2120f7478e55..64f00aedf9af 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -857,7 +857,7 @@ 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)
-- 
2.41.0