diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-07 15:39:40 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-09 13:34:46 +0100 |
| commit | 05876f88ed9a66b26af613e222795ae790616252 (patch) | |
| tree | 1f2c5be1c98eb2ea668410fa90b2f28156e479f6 | |
| parent | eecb9a697f0b790e5840dae8a8b866bea49a86ee (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>
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 8 | ||||
| -rw-r--r-- | drivers/acpi/bus.c | 6 |
2 files changed, 11 insertions, 3 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 5424a18f2e4..7217834f6b1 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -124,12 +124,14 @@ char *__init __acpi_map_table(unsigned long phys, unsigned long size) static char *prev_map; static unsigned long prev_size; + if (prev_map) { + early_iounmap(prev_map, prev_size); + prev_map = NULL; + } + if (!phys || !size) return NULL; - if (prev_map) - early_iounmap(prev_map, prev_size); - prev_size = size; prev_map = early_ioremap(phys, size); 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(); |