On Wed, Dec 04, 2013 at 08:38:08AM +0800, Lv Zheng wrote: > In Linux kernel, ACPICA is wrapped and safely exported by CONFIG_ACPI. So > all external modules should depend on CONFIG_ACPI rather than using ACPICA > header directly for stubbing. But if we moves <acpi/acpi.h> inclusions > into "#ifdef CONFIG_ACPI", build breakge can help to detect wrong ACPICA > dependent modules. > > One of the build breakage is: > include/linux/acpi_io.h:7:45: error: unknown type name 'acpi_physical_address' > include/linux/acpi_io.h:8:10: error: unknown type name 'acpi_size' > include/linux/acpi_io.h:13:33: error: unknown type name 'acpi_physical_address' > include/linux/acpi_io.h:15:40: warning: 'struct acpi_generic_address' declared inside parameter list [enabled by default] > include/linux/acpi_io.h:15:40: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default] > include/linux/acpi_io.h:16:43: warning: 'struct acpi_generic_address' declared inside parameter list [enabled by default] > drivers/gpu/drm/i915/intel_opregion.c: In function 'intel_opregion_setup': > drivers/gpu/drm/i915/intel_opregion.c:883:2: error: implicit declaration of function 'acpi_os_ioremap' [-Werror=implicit-function-declaration] > drivers/gpu/drm/i915/intel_opregion.c:883:7: warning: assignment makes pointer from integer without a cast [enabled by default] > > The root causes of this breakage are: > 1. The <linux/acpi_io.h> depends on CONFIG_ACPI=y as most of the prototypes > exported by it are implemented in drivers/acpi/osl.c. > 2. CONFIG_DRM_I915 uses the only "inline" function acpi_os_ioremap() to > implement stubs but it shouldn't. > > Since ACPI IGD OpRegion is an ACPI-based mechanism, (please refer to the > Doclink below), this patch fixes this issue by making > drivers/gpu/drm/i915/intel_opregion.c dependent on CONFIG_ACPI. This is > identical to other Intel DRM drivers' OpRegion support (e.x., > drivers/gpu/drm/gma500/opregion.c). > > Since acpi_io.h is not safe for CONFIG_ACPI=y environment, this patch also > moves it to include/acpi, includes it in <linux/acpi.h> for CONFIG_ACPI=y > build environment and cleans up its inclusions by converting them into > <linux/acpi.h> inclusions. > > Doclink: https://01.org/linuxgraphics/sites/default/files/documentation/acpi_igd_opregion_spec.pdf > Cc: Matthew Garrett <mjg59@xxxxxxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> > Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx> Makes sense. Acked for merging through acpi trees (or whatever else is appropriate, patch seems to be part of a series). Cheers, Daniel > --- > drivers/acpi/apei/apei-base.c | 1 - > drivers/acpi/apei/apei-internal.h | 1 - > drivers/acpi/apei/ghes.c | 1 - > drivers/acpi/nvs.c | 1 - > drivers/acpi/osl.c | 1 - > drivers/gpu/drm/gma500/opregion.c | 1 - > drivers/gpu/drm/i915/Makefile | 3 +-- > drivers/gpu/drm/i915/i915_drv.h | 3 ++- > include/acpi/acpi_io.h | 17 +++++++++++++++++ > include/linux/acpi.h | 1 + > include/linux/acpi_io.h | 18 ------------------ > 11 files changed, 21 insertions(+), 27 deletions(-) > create mode 100644 include/acpi/acpi_io.h > delete mode 100644 include/linux/acpi_io.h > > diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c > index 6d2c49b..0760b75 100644 > --- a/drivers/acpi/apei/apei-base.c > +++ b/drivers/acpi/apei/apei-base.c > @@ -34,7 +34,6 @@ > #include <linux/module.h> > #include <linux/init.h> > #include <linux/acpi.h> > -#include <linux/acpi_io.h> > #include <linux/slab.h> > #include <linux/io.h> > #include <linux/kref.h> > diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h > index 21ba34a..e5bcd91 100644 > --- a/drivers/acpi/apei/apei-internal.h > +++ b/drivers/acpi/apei/apei-internal.h > @@ -8,7 +8,6 @@ > > #include <linux/cper.h> > #include <linux/acpi.h> > -#include <linux/acpi_io.h> > > struct apei_exec_context; > > diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c > index a30bc31..694c486 100644 > --- a/drivers/acpi/apei/ghes.c > +++ b/drivers/acpi/apei/ghes.c > @@ -33,7 +33,6 @@ > #include <linux/module.h> > #include <linux/init.h> > #include <linux/acpi.h> > -#include <linux/acpi_io.h> > #include <linux/io.h> > #include <linux/interrupt.h> > #include <linux/timer.h> > diff --git a/drivers/acpi/nvs.c b/drivers/acpi/nvs.c > index 386a9fe..ef28613 100644 > --- a/drivers/acpi/nvs.c > +++ b/drivers/acpi/nvs.c > @@ -12,7 +12,6 @@ > #include <linux/mm.h> > #include <linux/slab.h> > #include <linux/acpi.h> > -#include <linux/acpi_io.h> > > /* ACPI NVS regions, APEI may use it */ > > diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c > index 7e2d814..63251b6 100644 > --- a/drivers/acpi/osl.c > +++ b/drivers/acpi/osl.c > @@ -39,7 +39,6 @@ > #include <linux/workqueue.h> > #include <linux/nmi.h> > #include <linux/acpi.h> > -#include <linux/acpi_io.h> > #include <linux/efi.h> > #include <linux/ioport.h> > #include <linux/list.h> > diff --git a/drivers/gpu/drm/gma500/opregion.c b/drivers/gpu/drm/gma500/opregion.c > index ad0d6de..13ec628 100644 > --- a/drivers/gpu/drm/gma500/opregion.c > +++ b/drivers/gpu/drm/gma500/opregion.c > @@ -22,7 +22,6 @@ > * > */ > #include <linux/acpi.h> > -#include <linux/acpi_io.h> > #include "psb_drv.h" > #include "psb_intel_reg.h" > > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile > index 41838ea..d4ae48b 100644 > --- a/drivers/gpu/drm/i915/Makefile > +++ b/drivers/gpu/drm/i915/Makefile > @@ -38,7 +38,6 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o \ > intel_ringbuffer.o \ > intel_overlay.o \ > intel_sprite.o \ > - intel_opregion.o \ > intel_sideband.o \ > intel_uncore.o \ > dvo_ch7xxx.o \ > @@ -51,7 +50,7 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o \ > > i915-$(CONFIG_COMPAT) += i915_ioc32.o > > -i915-$(CONFIG_ACPI) += intel_acpi.o > +i915-$(CONFIG_ACPI) += intel_acpi.o intel_opregion.o > > i915-$(CONFIG_DRM_I915_FBDEV) += intel_fbdev.o > > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h > index ccdbecc..7f37b83 100644 > --- a/drivers/gpu/drm/i915/i915_drv.h > +++ b/drivers/gpu/drm/i915/i915_drv.h > @@ -2336,8 +2336,8 @@ extern void intel_i2c_reset(struct drm_device *dev); > > /* intel_opregion.c */ > struct intel_encoder; > -extern int intel_opregion_setup(struct drm_device *dev); > #ifdef CONFIG_ACPI > +extern int intel_opregion_setup(struct drm_device *dev); > extern void intel_opregion_init(struct drm_device *dev); > extern void intel_opregion_fini(struct drm_device *dev); > extern void intel_opregion_asle_intr(struct drm_device *dev); > @@ -2346,6 +2346,7 @@ extern int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, > extern int intel_opregion_notify_adapter(struct drm_device *dev, > pci_power_t state); > #else > +static inline int intel_opregion_setup(struct drm_device *dev) { return 0; } > static inline void intel_opregion_init(struct drm_device *dev) { return; } > static inline void intel_opregion_fini(struct drm_device *dev) { return; } > static inline void intel_opregion_asle_intr(struct drm_device *dev) { return; } > diff --git a/include/acpi/acpi_io.h b/include/acpi/acpi_io.h > new file mode 100644 > index 0000000..2be8580 > --- /dev/null > +++ b/include/acpi/acpi_io.h > @@ -0,0 +1,17 @@ > +#ifndef _ACPI_IO_H_ > +#define _ACPI_IO_H_ > + > +#include <linux/io.h> > + > +static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, > + acpi_size size) > +{ > + return ioremap_cache(phys, size); > +} > + > +void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size); > + > +int acpi_os_map_generic_address(struct acpi_generic_address *addr); > +void acpi_os_unmap_generic_address(struct acpi_generic_address *addr); > + > +#endif > diff --git a/include/linux/acpi.h b/include/linux/acpi.h > index d9099b1..726a6aa 100644 > --- a/include/linux/acpi.h > +++ b/include/linux/acpi.h > @@ -42,6 +42,7 @@ > #include <acpi/acpi_bus.h> > #include <acpi/acpi_drivers.h> > #include <acpi/acpi_numa.h> > +#include <acpi/acpi_io.h> > #include <asm/acpi.h> > > static inline acpi_handle acpi_device_handle(struct acpi_device *adev) > diff --git a/include/linux/acpi_io.h b/include/linux/acpi_io.h > deleted file mode 100644 > index 2a5a139..0000000 > --- a/include/linux/acpi_io.h > +++ /dev/null > @@ -1,18 +0,0 @@ > -#ifndef _ACPI_IO_H_ > -#define _ACPI_IO_H_ > - > -#include <linux/io.h> > -#include <acpi/acpi.h> /* FIXME: inclusion should be removed */ > - > -static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys, > - acpi_size size) > -{ > - return ioremap_cache(phys, size); > -} > - > -void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size); > - > -int acpi_os_map_generic_address(struct acpi_generic_address *addr); > -void acpi_os_unmap_generic_address(struct acpi_generic_address *addr); > - > -#endif > -- > 1.7.10 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
