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

From: Eric W. Biederman
Date: Tue Aug 01 2006 - 07:04:26 EST

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,

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