tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kexec: fix build error when hugetlbfs is disabled

free_huge_page() is undefined without CONFIG_HUGETLBFS and there's no
need to filter PageHuge() page is such a configuration either, so avoid
exporting the symbol to fix a build error:

In file included from kernel/kexec.c:14:0:
kernel/kexec.c: In function 'crash_save_vmcoreinfo_init':
kernel/kexec.c:1623:20: error: 'free_huge_page' undeclared (first use in this function)
VMCOREINFO_SYMBOL(free_huge_page);
^

Introduced by commit 8f1d26d0e59b ("kexec: export free_huge_page to
VMCOREINFO")

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Acked-by: Olof Johansson <olof@lixom.net>
Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

authored by

David Rientjes and committed by
Linus Torvalds 3a1122d2 4d0bd657

+2
+2
kernel/kexec.c
··· 1620 1620 #endif 1621 1621 VMCOREINFO_NUMBER(PG_head_mask); 1622 1622 VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE); 1623 + #ifdef CONFIG_HUGETLBFS 1623 1624 VMCOREINFO_SYMBOL(free_huge_page); 1625 + #endif 1624 1626 1625 1627 arch_crash_save_vmcoreinfo(); 1626 1628 update_vmcoreinfo_note();