6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yang Shi <yang@xxxxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxx/
Link: https://lkml.kernel.org/r/20240712155855.1130330-1-yang@xxxxxxxxxxxxxxxxxxxxxx
Fixes: 4ef9ad19e176 ("mm: huge_memory: don't force huge page alignment on 32 bit")
Signed-off-by: Yang Shi <yang@xxxxxxxxxxxxxxxxxxxxxx>
Reported-by: Yves-Alexis Perez <corsac@xxxxxxxxxx>
Tested-by: Yves-Alexis Perez <corsac@xxxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Jiri Slaby <jirislaby@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Salvatore Bonaccorso <carnil@xxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [6.8+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -602,7 +602,7 @@ static unsigned long __thp_get_unmapped_
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)
