Messages in this thread |  | | | Date | Thu, 7 Jun 2007 07:17:56 -0400 (EDT) | | From | "Robert P. J. Day" <> | | Subject | why does the macro "ZERO_PAGE" take an argument? |
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probably making a fool of myself here, but what is the purpose of that single argument to the macro "ZERO_PAGE"?
$ grep -r "define ZERO_PAGE" include include/asm-frv/pgtable.h:#define ZERO_PAGE(vaddr) ({ BUG(); NULL; }) include/asm-frv/pgtable.h:#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page) include/asm-v850/pgtable.h:#define ZERO_PAGE(vaddr) ((void *)0x87654321) include/asm-mips/pgtable.h:#define ZERO_PAGE(vaddr) \ include/asm-blackfin/pgtable.h:#define ZERO_PAGE(vaddr) (virt_to_page(0)) include/asm-parisc/pgtable.h:#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) include/asm-alpha/pgtable.h:#define ZERO_PAGE(vaddr) (virt_to_page(ZERO_PGE)) ... AFAICT, there are no definitions of that macro that actually use that argument. is that some kind of historical cruft?
rday -- ======================================================================== Robert P. J. Day Linux Consulting, Training and Annoying Kernel Pedantry Waterloo, Ontario, CANADA http://fsdev.net/wiki/index.php?title=Main_Page ======================================================================== - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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