To satisfy mmap()'s page-size boundary requirement, specify aligned attribute to vmcoreinfo_note objects to allocate it on page-size boundary. Signed-off-by: HATAYAMA Daisuke <d.hatayama at jp.fujitsu.com> --- include/linux/kexec.h | 6 ++++-- kernel/kexec.c | 2 +- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h index d2e6927..5113570 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -185,8 +185,10 @@ extern struct kimage *kexec_crash_image; #define VMCOREINFO_BYTES (4096) #define VMCOREINFO_NOTE_NAME "VMCOREINFO" #define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4) -#define VMCOREINFO_NOTE_SIZE (KEXEC_NOTE_HEAD_BYTES*2 + VMCOREINFO_BYTES \ - + VMCOREINFO_NOTE_NAME_BYTES) +#define VMCOREINFO_NOTE_SIZE ALIGN(KEXEC_NOTE_HEAD_BYTES*2 \ + +VMCOREINFO_BYTES \ + +VMCOREINFO_NOTE_NAME_BYTES, \ + PAGE_SIZE) /* Location of a reserved region to hold the crash kernel. */ diff --git a/kernel/kexec.c b/kernel/kexec.c index d1f365e..195de6d 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -43,7 +43,7 @@ note_buf_t __percpu *crash_notes; /* vmcoreinfo stuff */ static unsigned char vmcoreinfo_data[VMCOREINFO_BYTES]; -u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4]; +u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4] __aligned(PAGE_SIZE); size_t vmcoreinfo_size; size_t vmcoreinfo_max_size = sizeof(vmcoreinfo_data);
