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arm64: cpufeature: Avoid warnings due to unused symbols

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commit 12eb369125abe92bfc55e9ce198200f5807b63ff upstream.

An allnoconfig build complains about unused symbols due to functions
that are called via conditional cpufeature and cpu_errata table entries.

Annotate these as __maybe_unused if they are likely to be generic, or
predicate their compilation on the same option as the table entry if
they are specific to a given alternative.

Signed-off-by: Will Deacon <will.deacon@arm.com>
[Just a portion of the original patch]
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Will Deacon 2018-03-27 11:51:12 +01:00 committed by Greg Kroah-Hartman
parent 4af2276845
commit 66552949c8
1 changed files with 7 additions and 5 deletions
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12
arch/arm64/kernel/cpufeature.c
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@ -799,11 +799,6 @@ static bool has_no_hw_prefetch(const struct arm64_cpu_capabilities *entry, int _
MIDR_CPU_VAR_REV(1, MIDR_REVISION_MASK));
}
static bool runs_at_el2(const struct arm64_cpu_capabilities *entry, int __unused)
{
return is_kernel_in_hyp_mode();
}
static bool hyp_offset_low(const struct arm64_cpu_capabilities *entry,
int __unused)
{
@ -937,6 +932,12 @@ static int __init parse_kpti(char *str)
}
early_param("kpti", parse_kpti);
#ifdef CONFIG_ARM64_VHE
static bool runs_at_el2(const struct arm64_cpu_capabilities *entry, int __unused)
{
return is_kernel_in_hyp_mode();
}
static void cpu_copy_el2regs(const struct arm64_cpu_capabilities *__unused)
{
/*
@ -950,6 +951,7 @@ static void cpu_copy_el2regs(const struct arm64_cpu_capabilities *__unused)
if (!alternatives_applied)
write_sysreg(read_sysreg(tpidr_el1), tpidr_el2);
}
#endif
#ifdef CONFIG_ARM64_SSBD
static int ssbs_emulation_handler(struct pt_regs *regs, u32 instr)