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authorJeremy Fitzhardinge <jeremy@goop.org>2009-02-07 15:39:40 -0800
committerIngo Molnar <mingo@elte.hu>2009-02-09 13:34:46 +0100
commit05876f88ed9a66b26af613e222795ae790616252 (patch)
tree1f2c5be1c98eb2ea668410fa90b2f28156e479f6 /drivers/acpi/bus.c
parenteecb9a697f0b790e5840dae8a8b866bea49a86ee (diff)
acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap
On x86, __acpi_map_table uses early_ioremap() to create the mapping, replacing the previous mapping with a new one. Once enough of the kernel is up an running it switches to using normal ioremap(). At that point, we need to clean up the final mapping to avoid a warning from the early_ioremap subsystem. This can be removed after all the instances in the ACPI code are fixed that rely on early-ioremap's implicit overmapping of previously mapped tables. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Len Brown <len.brown@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/acpi/bus.c')
-rw-r--r--drivers/acpi/bus.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 765fd1c56cd..fb1be7b5dbc 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -694,6 +694,12 @@ void __init acpi_early_init(void)
if (!acpi_strict)
acpi_gbl_enable_interpreter_slack = TRUE;
+ /*
+ * Doing a zero-sized mapping will clear out the previous
+ * __acpi_map_table() mapping, if any.
+ */
+ __acpi_map_table(0, 0);
+
acpi_gbl_permanent_mmap = 1;
status = acpi_reallocate_root_table();