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authorArnd Bergmann <arnd@arndb.de>2018-06-05 13:35:15 +0200
committerThomas Gleixner <tglx@linutronix.de>2018-06-06 12:09:45 +0200
commit046c0dbec0238c25b7526c26c9a9687664229ce2 (patch)
tree542ff97f901a508f4c085d887be448b602feb04a /Kconfig
parent24dd064d5b56b12c1346cc5c9c2bc99d168e729f (diff)
downloadlinux-046c0dbec0238c25b7526c26c9a9687664229ce2.tar.bz2
x86: Mark native_set_p4d() as __always_inline
When CONFIG_OPTIMIZE_INLINING is enabled, the function native_set_p4d() may not be fully inlined into the caller, resulting in a false-positive warning about an access to the __pgtable_l5_enabled variable from a non-__init function, despite the original caller being an __init function: WARNING: vmlinux.o(.text.unlikely+0x1429): Section mismatch in reference from the function native_set_p4d() to the variable .init.data:__pgtable_l5_enabled WARNING: vmlinux.o(.text.unlikely+0x1429): Section mismatch in reference from the function native_p4d_clear() to the variable .init.data:__pgtable_l5_enabled The function native_set_p4d() references the variable __initdata __pgtable_l5_enabled. This is often because native_set_p4d lacks a __initdata annotation or the annotation of __pgtable_l5_enabled is wrong. Marking the native_set_p4d function and its caller native_p4d_clear() avoids this problem. I did not bisect the original cause, but I assume this is related to the recent rework that turned pgtable_l5_enabled() into an inline function, which in turn caused the compiler to make different inlining decisions. Fixes: ad3fe525b950 ("x86/mm: Unify pgtable_l5_enabled usage in early boot code") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Zi Yan <zi.yan@cs.rutgers.edu> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Link: https://lkml.kernel.org/r/20180605113715.1133726-1-arnd@arndb.de
Diffstat (limited to 'Kconfig')
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