diff options
Diffstat (limited to 'kernel/crash_core.c')
| -rw-r--r-- | kernel/crash_core.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/crash_core.c b/kernel/crash_core.c index a5e8523dd6eb..3b1c43382eec 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -265,6 +265,20 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, return 0; } +/** + * crash_exclude_mem_range - exclude a mem range for existing ranges + * @mem: mem->range contains an array of ranges sorted in ascending order + * @mstart: the start of to-be-excluded range + * @mend: the start of to-be-excluded range + * + * If you are unsure if a range split will happen, to avoid function call + * failure because of -ENOMEM, always make sure + * mem->max_nr_ranges == mem->nr_ranges + 1 + * before calling the function each time. + * + * returns 0 if a memory range is excluded successfully + * return -ENOMEM if mem->ranges doesn't have space to hold split ranges + */ int crash_exclude_mem_range(struct crash_mem *mem, unsigned long long mstart, unsigned long long mend) { @@ -324,6 +338,7 @@ int crash_exclude_mem_range(struct crash_mem *mem, return 0; } +EXPORT_SYMBOL_GPL(crash_exclude_mem_range); ssize_t crash_get_memory_size(void) { |