AArch32 uses a 16k alignment for shmat rather than the page size. Only use the legacy alignment when in compat32 on arm64.
Signed-off-by: Teo Couprie Diaz teo.coupriediaz@arm.com --- arch/arm64/include/asm/shmparam.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/include/asm/shmparam.h b/arch/arm64/include/asm/shmparam.h index f920e22ec677..37f84b356f6d 100644 --- a/arch/arm64/include/asm/shmparam.h +++ b/arch/arm64/include/asm/shmparam.h @@ -5,12 +5,14 @@ #ifndef __ASM_SHMPARAM_H #define __ASM_SHMPARAM_H
+#ifdef CONFIG_COMPAT32 /* * For IPC syscalls from compat tasks, we need to use the legacy 16k * alignment value. Since we don't have aliasing D-caches, the rest of * the time we can safely use PAGE_SIZE. */ #define COMPAT_SHMLBA (4 * PAGE_SIZE) +#endif
#include <asm-generic/shmparam.h>