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x86: xen: remove unnecessary variable in xen_foreach_remap_area()

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Remove unnecessary variable mfn in function xen_foreach_remap_area() and,
refactor the code.

Variable mfn at line 518:mfn = xen_remap_buf.mfns[i];
is only being used to store a value to be passed as
an argument to the xen_update_mem_tables() function.
This value can be passed directly, which makes variable
mfn unnecessary. Also, value assigned to variable mfn
at line 534:mfn = xen_remap_mfn; is never used.

Addresses-Coverity-ID: 1260110
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Gustavo A. R. Silva 2017-06-23 17:01:20 -05:00 committed by Juergen Gross
parent a5d5f328b0
commit bf1b9ddf18
1 changed files with 2 additions and 5 deletions
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7
arch/x86/xen/setup.c
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@ -499,7 +499,7 @@ static unsigned long __init xen_foreach_remap_area(unsigned long nr_pages,
void __init xen_remap_memory(void)
{
unsigned long buf = (unsigned long)&xen_remap_buf;
unsigned long mfn_save, mfn, pfn;
unsigned long mfn_save, pfn;
unsigned long remapped = 0;
unsigned int i;
unsigned long pfn_s = ~0UL;
@ -515,8 +515,7 @@ void __init xen_remap_memory(void)
pfn = xen_remap_buf.target_pfn;
for (i = 0; i < xen_remap_buf.size; i++) {
mfn = xen_remap_buf.mfns[i];
xen_update_mem_tables(pfn, mfn);
xen_update_mem_tables(pfn, xen_remap_buf.mfns[i]);
remapped++;
pfn++;
}
@ -530,8 +529,6 @@ void __init xen_remap_memory(void)
pfn_s = xen_remap_buf.target_pfn;
len = xen_remap_buf.size;
}
mfn = xen_remap_mfn;
xen_remap_mfn = xen_remap_buf.next_area_mfn;
}