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authorYinghai Lu <yinghai@kernel.org>2009-03-12 16:04:42 -0700
committerH. Peter Anvin <hpa@zytor.com>2009-03-14 17:23:47 -0700
commit7543c1de84ed93c6769c9f20dced08a522af8912 (patch)
treedbeab0ab071b86c80b4d7c2701c7b767616772a6 /arch/x86/kernel/head_32.S
parent6de6cb442e76bbaf2e685150be8ddac0f237a59c (diff)
x86-32: compute initial mapping size more accurately
Impact: simplification We only need to map the kernel in head_32.S, not the whole of lowmem. We use 512MB as a reasonable (but arbitrary) limit on the maximum size of the kernel image. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/head_32.S')
-rw-r--r--arch/x86/kernel/head_32.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index db6652710e98..3ce5456dfbe6 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -54,7 +54,7 @@
*
* This should be a multiple of a page.
*/
-LOW_PAGES = 1<<(32-PAGE_SHIFT_asm)
+LOW_PAGES = (KERNEL_IMAGE_SIZE + PAGE_SIZE_asm - 1)>>PAGE_SHIFT
/*
* To preserve the DMA pool in PAGEALLOC kernels, we'll allocate