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authorLen Brown <len.brown@intel.com>2009-01-28 18:28:09 -0500
committerLen Brown <len.brown@intel.com>2009-01-28 19:15:54 -0500
commit31878dd86b7df9a147f5e6cc6e07092b4308782b (patch)
treee99eaf24e4d813bf43737f02c8746c17383a841d /drivers/acpi/Kconfig
parenta2b7b01c072435b7832ab392167545a1b38cabc3 (diff)
ACPI: remove BM_RLD access from idle entry path
It is true that BM_RLD needs to be set to enable bus master activity to wake an older chipset (eg PIIX4) from C3. This is contrary to the erroneous wording the ACPI 2.0, 3.0 specifications that suggests that BM_RLD is an indicator rather than a control bit. ACPI 1.0's correct wording should be restored in ACPI 4.0: http://www.acpica.org/bugzilla/show_bug.cgi?id=689 But the kernel should not have to clear BM_RLD when entering a non C3-type state just to set it again when entering a C3-type C-state. We should be able to set BM_RLD at boot time and leave it alone -- removing the overhead of accessing this IO register from the idle entry path. Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/Kconfig')
0 files changed, 0 insertions, 0 deletions