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Message-ID: <fbd277f20810120645g7feb4b85g49211641829e153e@mail.gmail.com>
Date: Sun, 12 Oct 2008 21:45:12 +0800
From: "bibo mao" <bibo.mao@...il.com>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org
Subject: [patch 0/1]pat: remove redundant condition check
On file pat.c, if (start <= entry->start), it also means (start <
entry->end). This patch removes
redundant condition check.
Signed-off-by: bibo.mao@...il.com
thanks
bibo,mao
------------------------------------------------------
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 2a50e0f..12cac5e 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -305,27 +305,6 @@ int reserve_memtype(u64 start, u64 end, unsigned
long req_type,
struct memtype, nd);
}
break;
- } else if (start < entry->end) { /* start > entry->start */
- err = chk_conflict(new, entry, new_type);
- if (!err) {
- dprintk("Overlap at 0x%Lx-0x%Lx\n",
- entry->start, entry->end);
- cached_entry = list_entry(entry->nd.prev,
- struct memtype, nd);
-
- /*
- * Move to right position in the linked
- * list to add this new entry
- */
- list_for_each_entry_continue(entry,
- &memtype_list, nd) {
- if (start <= entry->start) {
- where = entry->nd.prev;
- break;
- }
- }
- }
- break;
}
}
--
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