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HATAYAMA Daisuke authored
Allocate ELF headers on page-size boundary using __get_free_pages() instead of kmalloc(). Later patch will merge PT_NOTE entries into a single unique one and decrease the buffer size actually used. Keep original buffer size in variable elfcorebuf_sz_orig to kfree the buffer later and actually used buffer size with rounded up to page-size boundary in variable elfcorebuf_sz separately. The size of part of the ELF buffer exported from /proc/vmcore is elfcorebuf_sz. The merged, removed PT_NOTE entries, i.e. the range [elfcorebuf_sz, elfcorebuf_sz_orig], is filled with 0. Use size of the ELF headers as an initial offset value in set_vmcore_list_offsets_elf{64,32} and process_ptload_program_headers_elf{64,32} in order to indicate that the offset includes the holes towards the page boundary. As a result, both set_vmcore_list_offsets_elf{64,32} have the same definition. Merge them as set_vmcore_list_offsets. [akpm@linux-foundation.org: add free_elfcorebuf(), cleanups] Signed-off-by:
HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Acked-by:
Vivek Goyal <vgoyal@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp> Cc: Lisa Mitchell <lisa.mitchell@hp.com> Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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