From d5096850b47424fb0f1c6a75b8f7184f7169319a Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Fri, 30 Mar 2012 14:16:49 -0400 Subject: [PATCH] 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 --- arch/x86/xen/p2m.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index 8b3a395..952edef 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) -- 2.7.4