[PATCH 3/33] i386 setup.c: Reserve kernel memory starting from _text

[Eric W. Biederman]

Currently when we are reserving the memory the kernel text
resides in we start at __PHYSICAL_START which happens to be
correct but not very obvious.  In addition when we start relocating
the kernel __PHYSICAL_START is the wrong value, as it is an
absolute symbol that does not get relocated.

By starting the reservation at __pa_symbol(_text)
the code is clearer and will be correct when relocated.

Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
---
 arch/i386/kernel/setup.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index f168220..f3a451a 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1219,8 +1219,8 @@ void __init setup_bootmem_allocator(void
 	 * the (very unlikely) case of us accidentally initializing the
 	 * bootmem allocator with an invalid RAM area.
 	 */
-	reserve_bootmem(__PHYSICAL_START, (PFN_PHYS(min_low_pfn) +
-			 bootmap_size + PAGE_SIZE-1) - (__PHYSICAL_START));
+	reserve_bootmem(__pa_symbol(_text), (PFN_PHYS(min_low_pfn) +
+			 bootmap_size + PAGE_SIZE-1) - __pa_symbol(_text));
 
 	/*
 	 * reserve physical page 0 - it's a special BIOS page on many boxes,
-- 
1.4.2.rc2.g5209e

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