[PATCH 2/4] modules: Ensure 64-bit alignment on __ksymtab_* sections

[deller]

From: Helge Deller <del...@gmx.de>

On 64-bit architectures without CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
(e.g. ppc64, ppc64le, parisc, s390x,...) the __KSYM_REF() macro stores
64-bit pointers into the __ksymtab* sections.
Make sure that those sections will be correctly aligned at module link time,
otherwise unaligned memory accesses may happen at runtime.

The __kcrctab* sections store 32-bit entities, so use ALIGN(4) for those.

Signed-off-by: Helge Deller <del...@gmx.de>
Cc: <sta...@vger.kernel.org> # v6.0+
---
 scripts/module.lds.S | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/scripts/module.lds.S b/scripts/module.lds.S
index bf5bcf2836d8..b00415a9ff27 100644
--- a/scripts/module.lds.S
+++ b/scripts/module.lds.S
@@ -15,10 +15,10 @@ SECTIONS {
                *(.discard.*)
        }
 
-       __ksymtab               0 : { *(SORT(___ksymtab+*)) }
-       __ksymtab_gpl           0 : { *(SORT(___ksymtab_gpl+*)) }
-       __kcrctab               0 : { *(SORT(___kcrctab+*)) }
-       __kcrctab_gpl           0 : { *(SORT(___kcrctab_gpl+*)) }
+       __ksymtab               0 : ALIGN(8) { *(SORT(___ksymtab+*)) }
+       __ksymtab_gpl           0 : ALIGN(8) { *(SORT(___ksymtab_gpl+*)) }
+       __kcrctab               0 : ALIGN(4) { *(SORT(___kcrctab+*)) }
+       __kcrctab_gpl           0 : ALIGN(4) { *(SORT(___kcrctab_gpl+*)) }
 
        .ctors                  0 : ALIGN(8) { *(SORT(.ctors.*)) *(.ctors) }
        .init_array             0 : ALIGN(8) { *(SORT(.init_array.*)) 
*(.init_array) }
-- 
2.41.0