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Baoquan He
199da8714c
Nathan reported below building error: ===== $ curl -LSso .config https://git.alpinelinux.org/aports/plain/community/linux-edge/config-edge.armv7 $ make -skj"$(nproc)" ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- olddefconfig all .. arm-linux-gnueabi-ld: arch/arm/kernel/machine_kexec.o: in function `arch_crash_save_vmcoreinfo': machine_kexec.c:(.text+0x488): undefined reference to `vmcoreinfo_append_str' ==== On architecutres, like arm, s390, ppc, sh, function arch_crash_save_vmcoreinfo() is located in machine_kexec.c and it can only be compiled in when CONFIG_KEXEC_CORE=y. That's not right because arch_crash_save_vmcoreinfo() is used to export arch specific vmcoreinfo. CONFIG_VMCORE_INFO is supposed to control its compiling in. However, CONFIG_VMVCORE_INFO could be independent of CONFIG_KEXEC_CORE, e.g CONFIG_PROC_KCORE=y will select CONFIG_VMVCORE_INFO. Or CONFIG_KEXEC/CONFIG_KEXEC_FILE is set while CONFIG_CRASH_DUMP is not set, it will report linking error. So, on arm, s390, ppc and sh, move arch_crash_save_vmcoreinfo out to a new file vmcore_info.c. Let CONFIG_VMCORE_INFO decide if compiling in arch_crash_save_vmcoreinfo(). [[email protected]: remove stray newlines at eof] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Baoquan He <[email protected]> Reported-by: Nathan Chancellor <[email protected]> Closes: https://lore.kernel.org/all/[email protected]/T/#u Cc: Al Viro <[email protected]> Cc: Eric W. Biederman <[email protected]> Cc: Hari Bathini <[email protected]> Cc: Klara Modin <[email protected]> Cc: Michael Kelley <[email protected]> Cc: Pingfan Liu <[email protected]> Cc: Stephen Rothwell <[email protected]> Cc: Yang Li <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
16 lines
294 B
C
16 lines
294 B
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/vmcore_info.h>
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#include <linux/mm.h>
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void arch_crash_save_vmcoreinfo(void)
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{
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#ifdef CONFIG_NUMA
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VMCOREINFO_SYMBOL(node_data);
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VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
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#endif
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#ifdef CONFIG_X2TLB
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VMCOREINFO_CONFIG(X2TLB);
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#endif
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}
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