[lkml]   [2010]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH v3 5/6] x86: update iomem_resource end based on CPU physical address capabilities

The iomem_resource map reflects the available physical address space.
We statically initialize the end to -1, i.e., 0xffffffff_ffffffff, but
of course we can only use as much as the CPU can address.

This patch updates the end based on the CPU capabilities, so we don't
mistakenly allocate space that isn't usable, as we're likely to do when
allocating from the top-down.

Signed-off-by: Bjorn Helgaas <>

arch/x86/kernel/setup.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index c3a4fbb..922b5a1 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -788,6 +788,7 @@ void __init setup_arch(char **cmdline_p)


+ iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
/* update the e820_saved too */

 \ /
  Last update: 2010-10-13 18:17    [W:0.072 / U:0.352 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site