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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 08:44:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 08:44:24 -0700 |
| commit | e3ebadd95cb621e2c7436f3d3646447ac9d5c16d (patch) | |
| tree | 510b41550cc3751cfb565e3e2ba195a68b784a03 /include/asm-x86_64/pgtable.h | |
| parent | 15700770ef7c5d12e2f1659d2ddbeb3f658d9f37 (diff) | |
| download | linux-e3ebadd95cb621e2c7436f3d3646447ac9d5c16d.tar.gz linux-e3ebadd95cb621e2c7436f3d3646447ac9d5c16d.tar.bz2 linux-e3ebadd95cb621e2c7436f3d3646447ac9d5c16d.zip | |
Revert "[PATCH] x86: __pa and __pa_symbol address space separation"
This was broken. It adds complexity, for no good reason. Rather than
separate __pa() and __pa_symbol(), we should deprecate __pa_symbol(),
and preferably __pa() too - and just use "virt_to_phys()" instead, which
is more readable and has nicer semantics.
However, right now, just undo the separation, and make __pa_symbol() be
the exact same as __pa(). That fixes the bugs this patch introduced,
and we can do the fairly obvious cleanups later.
Do the new __phys_addr() function (which is now the actual workhorse for
the unified __pa()/__pa_symbol()) as a real external function, that way
all the potential issues with compile/link-time optimizations of
constant symbol addresses go away, and we can also, if we choose to, add
more sanity-checking of the argument.
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-x86_64/pgtable.h')
| -rw-r--r-- | include/asm-x86_64/pgtable.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-x86_64/pgtable.h b/include/asm-x86_64/pgtable.h index 599993f6ba84..da3390faaea6 100644 --- a/include/asm-x86_64/pgtable.h +++ b/include/asm-x86_64/pgtable.h @@ -19,7 +19,7 @@ extern pmd_t level2_kernel_pgt[512]; extern pgd_t init_level4_pgt[]; extern unsigned long __supported_pte_mask; -#define swapper_pg_dir ((pgd_t *)NULL) +#define swapper_pg_dir init_level4_pgt extern void paging_init(void); extern void clear_kernel_mapping(unsigned long addr, unsigned long size); @@ -29,7 +29,7 @@ extern void clear_kernel_mapping(unsigned long addr, unsigned long size); * for zero-mapped memory areas etc.. */ extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; -#define ZERO_PAGE(vaddr) (pfn_to_page(__pa_symbol(&empty_zero_page) >> PAGE_SHIFT)) +#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) #endif /* !__ASSEMBLY__ */ |