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authorGeert Uytterhoeven <geert@linux-m68k.org>2017-12-14 15:32:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-12-14 16:00:48 -0800
commit183f24aa5b76e37da690b2def41cc70f0792ce09 (patch)
tree844940bb48a7feece30be4412d46b426ade1bd8f /README
parent4cc90b4cc3d4955f79eae4f7f9d64e67e17b468e (diff)
mm/memory.c: mark wp_huge_pmd() inline to prevent build failure
With gcc 4.1.2: mm/memory.o: In function `wp_huge_pmd': memory.c:(.text+0x9b4): undefined reference to `do_huge_pmd_wp_page' Interestingly, wp_huge_pmd() is emitted in the assembler output, but never called. Apparently replacing the call to pmd_write() in __handle_mm_fault() by a call to the more complex pmd_access_permitted() reduced the ability of the compiler to remove unused code. Fix this by marking wp_huge_pmd() inline, like was done in commit 91a90140f998 ("mm/memory.c: mark create_huge_pmd() inline to prevent build failure") for a similar problem. [akpm@linux-foundation.org: add comment] Link: http://lkml.kernel.org/r/1512335500-10889-1-git-send-email-geert@linux-m68k.org Fixes: c7da82b894e9eef6 ("mm: replace pmd_write with pmd_access_permitted in fault + gup paths") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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