diff options
Diffstat (limited to 'kernel/kexec.c')
-rw-r--r-- | kernel/kexec.c | 43 |
1 files changed, 16 insertions, 27 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c index ffd4e111fd67..59f7b55ba745 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -786,7 +786,7 @@ static int kimage_load_normal_segment(struct kimage *image, struct kexec_segment *segment) { unsigned long maddr; - unsigned long ubytes, mbytes; + size_t ubytes, mbytes; int result; unsigned char __user *buf; @@ -819,13 +819,9 @@ static int kimage_load_normal_segment(struct kimage *image, /* Start with a clear page */ clear_page(ptr); ptr += maddr & ~PAGE_MASK; - mchunk = PAGE_SIZE - (maddr & ~PAGE_MASK); - if (mchunk > mbytes) - mchunk = mbytes; - - uchunk = mchunk; - if (uchunk > ubytes) - uchunk = ubytes; + mchunk = min_t(size_t, mbytes, + PAGE_SIZE - (maddr & ~PAGE_MASK)); + uchunk = min(ubytes, mchunk); result = copy_from_user(ptr, buf, uchunk); kunmap(page); @@ -850,7 +846,7 @@ static int kimage_load_crash_segment(struct kimage *image, * We do things a page at a time for the sake of kmap. */ unsigned long maddr; - unsigned long ubytes, mbytes; + size_t ubytes, mbytes; int result; unsigned char __user *buf; @@ -871,13 +867,10 @@ static int kimage_load_crash_segment(struct kimage *image, } ptr = kmap(page); ptr += maddr & ~PAGE_MASK; - mchunk = PAGE_SIZE - (maddr & ~PAGE_MASK); - if (mchunk > mbytes) - mchunk = mbytes; - - uchunk = mchunk; - if (uchunk > ubytes) { - uchunk = ubytes; + mchunk = min_t(size_t, mbytes, + PAGE_SIZE - (maddr & ~PAGE_MASK)); + uchunk = min(ubytes, mchunk); + if (mchunk > uchunk) { /* Zero the trailing part of the page */ memset(ptr + uchunk, 0, mchunk - uchunk); } @@ -1118,12 +1111,8 @@ void __weak crash_free_reserved_phys_range(unsigned long begin, { unsigned long addr; - for (addr = begin; addr < end; addr += PAGE_SIZE) { - ClearPageReserved(pfn_to_page(addr >> PAGE_SHIFT)); - init_page_count(pfn_to_page(addr >> PAGE_SHIFT)); - free_page((unsigned long)__va(addr)); - totalram_pages++; - } + for (addr = begin; addr < end; addr += PAGE_SIZE) + free_reserved_page(pfn_to_page(addr >> PAGE_SHIFT)); } int crash_shrink_memory(unsigned long new_size) @@ -1544,14 +1533,13 @@ void vmcoreinfo_append_str(const char *fmt, ...) { va_list args; char buf[0x50]; - int r; + size_t r; va_start(args, fmt); r = vsnprintf(buf, sizeof(buf), fmt, args); va_end(args); - if (r + vmcoreinfo_size > vmcoreinfo_max_size) - r = vmcoreinfo_max_size - vmcoreinfo_size; + r = min(r, vmcoreinfo_max_size - vmcoreinfo_size); memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r); @@ -1581,7 +1569,7 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_SYMBOL(swapper_pg_dir); #endif VMCOREINFO_SYMBOL(_stext); - VMCOREINFO_SYMBOL(vmlist); + VMCOREINFO_SYMBOL(vmap_area_list); #ifndef CONFIG_NEED_MULTIPLE_NODES VMCOREINFO_SYMBOL(mem_map); @@ -1619,7 +1607,8 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_OFFSET(free_area, free_list); VMCOREINFO_OFFSET(list_head, next); VMCOREINFO_OFFSET(list_head, prev); - VMCOREINFO_OFFSET(vm_struct, addr); + VMCOREINFO_OFFSET(vmap_area, va_start); + VMCOREINFO_OFFSET(vmap_area, list); VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER); log_buf_kexec_setup(); VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES); |