4.20-stable review patch. If anyone has any objections, please let me know.
------------------ From: Huacai Chen <che...@lemote.com> commit bec0de4cfad21bd284dbddee016ed1767a5d2823 upstream. KEXEC needs the new kernel's load address to be aligned on a page boundary (see sanity_check_segment_list()), but on MIPS the default vmlinuz load address is only explicitly aligned to 16 bytes. Since the largest PAGE_SIZE supported by MIPS kernels is 64KB, increase the alignment calculated by calc_vmlinuz_load_addr to 64KB. Signed-off-by: Huacai Chen <che...@lemote.com> Signed-off-by: Paul Burton <paul.bur...@mips.com> Patchwork: https://patchwork.linux-mips.org/patch/21131/ Cc: Ralf Baechle <r...@linux-mips.org> Cc: James Hogan <james.ho...@mips.com> Cc: Steven J . Hill <steven.h...@cavium.com> Cc: linux-m...@linux-mips.org Cc: Fuxin Zhang <zhan...@lemote.com> Cc: Zhangjin Wu <wuzhang...@gmail.com> Cc: <sta...@vger.kernel.org> # 2.6.36+ Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- arch/mips/boot/compressed/calc_vmlinuz_load_addr.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c +++ b/arch/mips/boot/compressed/calc_vmlinuz_load_addr.c @@ -13,6 +13,7 @@ #include <stdint.h> #include <stdio.h> #include <stdlib.h> +#include "../../../../include/linux/sizes.h" int main(int argc, char *argv[]) { @@ -45,11 +46,11 @@ int main(int argc, char *argv[]) vmlinuz_load_addr = vmlinux_load_addr + vmlinux_size; /* - * Align with 16 bytes: "greater than that used for any standard data - * types by a MIPS compiler." -- See MIPS Run Linux (Second Edition). + * Align with 64KB: KEXEC needs load sections to be aligned to PAGE_SIZE, + * which may be as large as 64KB depending on the kernel configuration. */ - vmlinuz_load_addr += (16 - vmlinux_size % 16); + vmlinuz_load_addr += (SZ_64K - vmlinux_size % SZ_64K); printf("0x%llx\n", vmlinuz_load_addr);
