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authorLinus Torvalds <torvalds@linux-foundation.org>2009-05-20 16:30:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-05-20 16:30:36 -0700
commit9fe02c03b4e892acb3c33819ac4385d43b2f0bd7 (patch)
treec2b7503c9ce846aaeacde76141314e2dbcde927a /include
parent6c2445efb816a34dab7bb7357317e2d656f14cb1 (diff)
parent03fbdb15c14e9746c63168e3ff2c64b9c8336d33 (diff)
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Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm: (25 commits) [ARM] 5519/1: amba probe: pass "struct amba_id *" instead of void * [ARM] 5517/1: integrator: don't put clock lookups in __initdata [ARM] 5518/1: versatile: don't put clock lookups in __initdata [ARM] mach-l7200: fix spelling of SYS_CLOCK_OFF [ARM] Double check memmap is actually valid with a memmap has unexpected holes V2 [ARM] realview: fix broadcast tick support [ARM] realview: remove useless smp_cross_call_done() [ARM] smp: fix cpumask usage in ARM SMP code [ARM] 5513/1: Eurotech VIPER SBC: fix compilation error [ARM] 5509/1: ep93xx: clkdev enable UARTS ARM: OMAP2/3: Change omapfb to use clkdev for dispc and rfbi, v2 ARM: OMAP3: Fix HW SAVEANDRESTORE shift define ARM: OMAP3: Fix number of GPIO lines for 34xx [ARM] S3C: Do not set clk->owner field if unset [ARM] S3C2410: mach-bast.c registering i2c data too early [ARM] S3C24XX: Fix unused code warning in arch/arm/plat-s3c24xx/dma.c [ARM] S3C64XX: fix GPIO debug [ARM] S3C64XX: GPIO include cleanup [ARM] nwfpe: fix 'floatx80_is_nan' sparse warning [ARM] nwfpe: Add decleration for ExtendedCPDO ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/amba/bus.h2
-rw-r--r--include/linux/mmzone.h26
2 files changed, 27 insertions, 1 deletions
diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
index 51e6e54b2aa1..9b93cafa82a0 100644
--- a/include/linux/amba/bus.h
+++ b/include/linux/amba/bus.h
@@ -28,7 +28,7 @@ struct amba_id {
struct amba_driver {
struct device_driver drv;
- int (*probe)(struct amba_device *, void *);
+ int (*probe)(struct amba_device *, struct amba_id *);
int (*remove)(struct amba_device *);
void (*shutdown)(struct amba_device *);
int (*suspend)(struct amba_device *, pm_message_t);
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 186ec6ab334d..a47c879e1304 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1097,6 +1097,32 @@ unsigned long __init node_memmap_size_bytes(int, unsigned long, unsigned long);
#define pfn_valid_within(pfn) (1)
#endif
+#ifdef CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
+/*
+ * pfn_valid() is meant to be able to tell if a given PFN has valid memmap
+ * associated with it or not. In FLATMEM, it is expected that holes always
+ * have valid memmap as long as there is valid PFNs either side of the hole.
+ * In SPARSEMEM, it is assumed that a valid section has a memmap for the
+ * entire section.
+ *
+ * However, an ARM, and maybe other embedded architectures in the future
+ * free memmap backing holes to save memory on the assumption the memmap is
+ * never used. The page_zone linkages are then broken even though pfn_valid()
+ * returns true. A walker of the full memmap must then do this additional
+ * check to ensure the memmap they are looking at is sane by making sure
+ * the zone and PFN linkages are still valid. This is expensive, but walkers
+ * of the full memmap are extremely rare.
+ */
+int memmap_valid_within(unsigned long pfn,
+ struct page *page, struct zone *zone);
+#else
+static inline int memmap_valid_within(unsigned long pfn,
+ struct page *page, struct zone *zone)
+{
+ return 1;
+}
+#endif /* CONFIG_ARCH_HAS_HOLES_MEMORYMODEL */
+
#endif /* !__GENERATING_BOUNDS.H */
#endif /* !__ASSEMBLY__ */
#endif /* _LINUX_MMZONE_H */