Commit a2d6aa8f authored by Baoquan He's avatar Baoquan He Committed by Linus Torvalds
Browse files

kexec: check if crashk_res_low exists when exclude it from crash mem ranges



Add a check if crashk_res_low exists just like GART region does.  If
crashk_res_low doesn't exist, calling exclude_mem_range is unnecessary.

Meanwhile, since crashk_res_low has been initialized at definition, it's
safe just use "if (crashk_low_res.end)" to check if it's exist.  And this
can make it consistent with other places of check.

Signed-off-by: default avatarBaoquan He <bhe@redhat.com>
Acked-by: default avatarVivek Goyal <vgoyal@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 669280a1
......@@ -237,7 +237,7 @@ static void fill_up_crash_elf_data(struct crash_elf_data *ced,
ced->max_nr_ranges++;
/* If crashk_low_res is not 0, another range split possible */
if (crashk_low_res.end != 0)
if (crashk_low_res.end)
ced->max_nr_ranges++;
}
......@@ -335,9 +335,11 @@ static int elf_header_exclude_ranges(struct crash_elf_data *ced,
if (ret)
return ret;
ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end);
if (ret)
return ret;
if (crashk_low_res.end) {
ret = exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end);
if (ret)
return ret;
}
/* Exclude GART region */
if (ced->gart_end) {
......
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