Messages in this thread Patch in this message | | | From | Du Changbin <> | Subject | [PATCH v2 3/4] ARM: mm: fix build error in fix_to_virt with CONFIG_CC_OPTIMIZE_FOR_DEBUGGING | Date | Fri, 19 Oct 2018 12:49:20 +0000 |
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With '-Og' optimization level, GCC would not optimize a count for a loop as a constant value. But BUILD_BUG_ON() only accept compile-time constant values. Let's use __fix_to_virt() to avoid the error.
arch/arm/mm/mmu.o: In function `fix_to_virt': /home/changbin/work/linux/./include/asm-generic/fixmap.h:31: undefined reference to `__compiletime_assert_31' Makefile:1051: recipe for target 'vmlinux' failed make: *** [vmlinux] Error 1
Signed-off-by: Du Changbin <changbin.du@gmail.com> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> --- arch/arm/mm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index e46a6a446cdd..c08d74e76714 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1599,7 +1599,7 @@ static void __init early_fixmap_shutdown(void) pte_t *pte; struct map_desc map; - map.virtual = fix_to_virt(i); + map.virtual = __fix_to_virt(i); pte = pte_offset_early_fixmap(pmd_off_k(map.virtual), map.virtual); /* Only i/o device mappings are supported ATM */ -- 2.17.1
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