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authorArjun Roy <arjunroy@google.com>2020-04-10 14:32:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-10 15:36:21 -0700
commitc97078bd219cbe1a878b24bb4e61d312f19ece1f (patch)
tree875ea9eaf77017c75311a2e52a89a18ed9706b02 /mm/memory.c
parent251a0ffeaeee2a900765d98d44880943dce1047d (diff)
downloadlinux-stericsson-c97078bd219cbe1a878b24bb4e61d312f19ece1f.tar.gz
mm: define pte_index as macro for x86
pte_index() is either defined as a macro (e.g. sparc64) or as an inlined function (e.g. x86). vm_insert_pages() depends on pte_index but it is not defined on all platforms (e.g. m68k). To fix compilation of vm_insert_pages() on architectures not providing pte_index(), we perform the following fix: 0. For platforms where it is meaningful, and defined as a macro, no change is needed. 1. For platforms where it is meaningful and defined as an inlined function, and we want to use it with vm_insert_pages(), we define a degenerate macro of the form: #define pte_index pte_index 2. vm_insert_pages() checks for the existence of a pte_index macro definition. If found, it implements a batched insert. If not found, it devolves to calling vm_insert_page() in a loop. This patch implements step 1 for x86. v3 of this patch fixes a compilation warning for an unused method. v2 of this patch moved a macro definition to a more readable location. Signed-off-by: Arjun Roy <arjunroy@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Matthew Wilcox <willy@infradead.org> Cc: Soheil Hassas Yeganeh <soheil@google.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Link: http://lkml.kernel.org/r/20200228054714.204424-1-arjunroy.kdev@gmail.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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