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authorKonrad Rzeszutek Wilk2012-03-30 14:16:49 -0400
committerKonrad Rzeszutek Wilk2012-04-06 17:03:04 -0400
commitd5096850b47424fb0f1c6a75b8f7184f7169319a (patch)
treeec0106474b6a59a5c2e0e63957d0d2f319d4dd69 /arch/x86/xen
parentcef4cca551d652b7f69c9d76337c5fae24e069dc (diff)
xen/p2m: Collapse early_alloc_p2m_middle redundant checks.
At the start of the function we were checking for idx != 0 and bailing out. And later calling extend_brk if idx != 0. That is unnecessary so remove that checks. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/p2m.c25
1 files changed, 12 insertions, 13 deletions
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 8b3a3958d120..952edefcedb3 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -502,6 +502,8 @@ static bool alloc_p2m(unsigned long pfn)
static bool __init early_alloc_p2m_middle(unsigned long pfn, bool check_boundary)
{
unsigned topidx, mididx, idx;
+ unsigned long *p2m;
+ unsigned long *mid_mfn_p;
topidx = p2m_top_index(pfn);
mididx = p2m_mid_index(pfn);
@@ -522,24 +524,21 @@ static bool __init early_alloc_p2m_middle(unsigned long pfn, bool check_boundary
return false;
/* Boundary cross-over for the edges: */
- if (idx) {
- unsigned long *p2m = extend_brk(PAGE_SIZE, PAGE_SIZE);
- unsigned long *mid_mfn_p;
+ p2m = extend_brk(PAGE_SIZE, PAGE_SIZE);
- p2m_init(p2m);
+ p2m_init(p2m);
- p2m_top[topidx][mididx] = p2m;
+ p2m_top[topidx][mididx] = p2m;
- /* For save/restore we need to MFN of the P2M saved */
+ /* For save/restore we need to MFN of the P2M saved */
- mid_mfn_p = p2m_top_mfn_p[topidx];
- WARN(mid_mfn_p[mididx] != virt_to_mfn(p2m_missing),
- "P2M_TOP_P[%d][%d] != MFN of p2m_missing!\n",
- topidx, mididx);
- mid_mfn_p[mididx] = virt_to_mfn(p2m);
+ mid_mfn_p = p2m_top_mfn_p[topidx];
+ WARN(mid_mfn_p[mididx] != virt_to_mfn(p2m_missing),
+ "P2M_TOP_P[%d][%d] != MFN of p2m_missing!\n",
+ topidx, mididx);
+ mid_mfn_p[mididx] = virt_to_mfn(p2m);
- }
- return idx != 0;
+ return true;
}
static bool __init early_alloc_p2m(unsigned long pfn)