Ingo Molnar e9ba16e68c
smpboot: Mark idle_init() as __always_inlined to work around aggressive compiler un-inlining ...
While this function is a static inline, and is only used once in
local scope, certain Kconfig variations may cause it to be compiled
as a standalone function:
89231bf0 <idle_init>:
89231bf0: 83 05 60 d9 45 89 01 addl $0x1,0x8945d960
89231bf7: 55 push %ebp
Resulting in this build failure:
WARNING: modpost: vmlinux.o(.text.unlikely+0x7fd5): Section mismatch in reference from the function idle_init() to the function .init.text:fork_idle()
The function idle_init() references
the function __init fork_idle().
This is often because idle_init lacks a __init
annotation or the annotation of fork_idle is wrong.
ERROR: modpost: Section mismatches detected.
Certain USBSAN options x86-32 builds with CONFIG_CC_OPTIMIZE_FOR_SIZE=y
seem to be causing this.
So mark idle_init() as __always_inline to work around this compiler
bug/feature.
Signed-off-by: Ingo Molnar <mingo@kernel.org >
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