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kexec: remove unnecessary test in kimage_alloc_crash_control_pages() 

Transforming PFN(Page Frame Number) to struct page is never failure, so we
can simplify the code logic to do the image->control_page assignment
directly in the loop, and remove the unnecessary conditional judgement.

Signed-off-by: Minfei Huang <mnfhuang@gmail.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Simon Horman <horms@verge.net.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Minfei Huang 2015-09-09 15:38:58 -07:00 committed by Linus Torvalds
parent 2965faa5e0
commit 04e9949b2d
1 changed files with 1 additions and 2 deletions
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3
kernel/kexec_core.c
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@ -439,11 +439,10 @@ static struct page *kimage_alloc_crash_control_pages(struct kimage *image,
/* If I don't overlap any segments I have found my hole! */
if (i == image->nr_segments) {
pages = pfn_to_page(hole_start >> PAGE_SHIFT);
image->control_page = hole_end;
break;
}
}
if (pages)
image->control_page = hole_end;
return pages;
}