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Merge branch 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

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* 'for-2.6.25' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Add arch-specific walk_memory_remove() for 64-bit powerpc
  [POWERPC] Enable hotplug memory remove for 64-bit powerpc
  [POWERPC] Add remove_memory() for 64-bit powerpc
  [POWERPC] Make cell IOMMU fixed mapping printk more useful
  [POWERPC] Fix potential cell IOMMU bug when switching back to default DMA ops
  [POWERPC] Don't enable cell IOMMU fixed mapping if there are no dma-ranges
  [POWERPC] Fix cell IOMMU null pointer explosion on old firmwares
  [POWERPC] spufs: Fix timing dependent false return from spufs_run_spu
  [POWERPC] spufs: No need to have a runnable SPU for libassist update
  [POWERPC] spufs: Update SPU_Status[CISHP] in backing runcntl write
  [POWERPC] spufs: Fix state_mutex leaks
  [POWERPC] Disable G5 NAP mode during SMU commands on U3
This commit is contained in:
Linus Torvalds
2008-02-08 09:31:42 -08:00
parent f3aafa6c25 a99824f327
commit dde0013782
12 changed files with 166 additions and 60 deletions
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33
arch/powerpc/mm/mem.c
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@ -129,6 +129,39 @@ int __devinit arch_add_memory(int nid, u64 start, u64 size)
return __add_pages(zone, start_pfn, nr_pages);
}
#ifdef CONFIG_MEMORY_HOTREMOVE
int remove_memory(u64 start, u64 size)
{
unsigned long start_pfn, end_pfn;
int ret;
start_pfn = start >> PAGE_SHIFT;
end_pfn = start_pfn + (size >> PAGE_SHIFT);
ret = offline_pages(start_pfn, end_pfn, 120 * HZ);
if (ret)
goto out;
/* Arch-specific calls go here - next patch */
out:
return ret;
}
#endif /* CONFIG_MEMORY_HOTREMOVE */
/*
* walk_memory_resource() needs to make sure there is no holes in a given
* memory range. On PPC64, since this range comes from /sysfs, the range
* is guaranteed to be valid, non-overlapping and can not contain any
* holes. By the time we get here (memory add or remove), /proc/device-tree
* is updated and correct. Only reason we need to check against device-tree
* would be if we allow user-land to specify a memory range through a
* system call/ioctl etc. instead of doing offline/online through /sysfs.
*/
int
walk_memory_resource(unsigned long start_pfn, unsigned long nr_pages, void *arg,
int (*func)(unsigned long, unsigned long, void *))
{
return (*func)(start_pfn, nr_pages, arg);
}
#endif /* CONFIG_MEMORY_HOTPLUG */
void show_mem(void)