0Day build system reported build error on m68k architecture for missing the definition of MAX_PHYSMEM_BITS when defining PHYSMEM_END. Fixed it via making PHYSMEM_END definition depends on MAX_PHYSMEM_BITS definition conditionally. Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202409100913.RxkfrKU6-lkp@xxxxxxxxx/ --- include/linux/mm.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 147073601716..62bb7e7e0a17 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -98,7 +98,11 @@ extern int mmap_rnd_compat_bits __read_mostly; #endif #ifndef PHYSMEM_END -# define PHYSMEM_END ((1ULL << MAX_PHYSMEM_BITS) - 1) +# ifdef MAX_PHYSMEM_BITS +# define PHYSMEM_END ((1ULL << MAX_PHYSMEM_BITS) - 1) +# else +# define PHYSMEM_END (-1ULL) +# endif #endif #include <asm/page.h> -- 2.39.2
