kexec: remove never used member destination in kimage

struct kimage has a member destination which is used to store the real
destination address of each page when load segment from user space buffer
to kernel.  But we never retrieve the value stored in kimage->destination,
so this member variable in kimage and its assignment operation are
redundent code.

I guess for_each_kimage_entry just does the work that kimage->destination
is expected to do.

So in this patch just make a cleanup to remove it.

Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 9d957b7..10da8e2 100644 (file)
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -122,8 +122,6 @@ struct kimage {
        kimage_entry_t *entry;
        kimage_entry_t *last_entry;
 
-       unsigned long destination;
-
        unsigned long start;
        struct page *control_code_page;
        struct page *swap_page;

diff --git a/kernel/kexec.c b/kernel/kexec.c
index c852776..35dcac4 100644 (file)
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -856,8 +856,6 @@ static int kimage_set_destination(struct kimage *image,
 
        destination &= PAGE_MASK;
        result = kimage_add_entry(image, destination | IND_DESTINATION);
-       if (result == 0)
-               image->destination = destination;
 
        return result;
 }
@@ -869,8 +867,6 @@ static int kimage_add_page(struct kimage *image, unsigned long page)
 
        page &= PAGE_MASK;
        result = kimage_add_entry(image, page | IND_SOURCE);
-       if (result == 0)
-               image->destination += PAGE_SIZE;
 
        return result;
 }