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</o:shapelayout></xml><![endif]--></head><body lang=KO link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hello all,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>In linux 5.4.21, when tell the compiler to use no optimzation for function early_fixmap_init as below,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>(I need to compile with O0 to follow what’s happening here using gdb.)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>#pragma GCC push_options<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>#pragma GCC optimze ("O0")<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>void __init early_fixmap_init(void) <o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>{<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>...<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>}<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>#pragma GCC pop_options<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I get this compiler error below. (make ARCH=arm64 CROSS_COMPILE=aarch64-none-elf- Image -j24)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd;text-indent:10.0pt'><span lang=EN-US>CALL scripts/atomic/check-atomics.sh<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> CALL scripts/checksyscalls.sh<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> CHK include/generated/compile.h<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> CC arch/arm64/mm/mmu.o<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> CC drivers/irqchip/irq-gic-v3.o<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>In file included from ./include/linux/build_bug.h:5,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> from ./arch/arm64/include/asm/sysreg.h:758,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> from ./arch/arm64/include/asm/cputype.h:126,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> from ./arch/arm64/include/asm/cache.h:8,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> from ./include/linux/cache.h:6,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> from arch/arm64/mm/mmu.c:9:<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>./arch/arm64/include/asm/pgalloc.h: In function '__pgd_populate.constprop':<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>./include/linux/compiler.h:350:38: error: call to '__compiletime_assert_88' declared with attribute error: BUILD_BUG failed<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> | ^<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>./include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> 331 | prefix ## suffix(); \<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> | ^~~~~~<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>./include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> | ^~~~~~~~~~~~~~~~~~~<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>./include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> | ^~~~~~~~~~~~~~~~~~<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>./include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> 59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> | ^~~~~~~~~~~~~~~~<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>./arch/arm64/include/asm/pgalloc.h:88:2: note: in expansion of macro 'BUILD_BUG'<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> 88 | BUILD_BUG();<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> | ^~~~~~~~~<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>make[2]: *** [scripts/Makefile.build:265: arch/arm64/mm/mmu.o] Error 1<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>make[1]: *** [scripts/Makefile.build:509: arch/arm64/mm] Error 2<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>make: *** [Makefile:1652: arch/arm64] Error 2<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US>make: *** Waiting for unfinished jobs....<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd'><span lang=EN-US> AR drivers/irqchip/built-in.a<o:p></o:p></span></p><p class=MsoNormal style='margin-left:20.0pt;mso-para-margin-left:2.0gd;text-indent:10.0pt'><span lang=EN-US>AR drivers/built-in.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>What does this mean and what should I do?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Chan Kim<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>