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arm64: cpufeature: Avoid warnings due to unused symbols 

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>
hifive-unleashed-5.1
Will Deacon 2018-03-27 11:51:12 +01:00
parent ece1397cbc
commit 12eb369125
2 changed files with 10 additions and 8 deletions
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6
arch/arm64/kernel/cpu_errata.c
View File

@ -285,8 +285,8 @@ qcom_enable_link_stack_sanitization(const struct arm64_cpu_capabilities *entry)
* of call backs, sharing the same capability bit.
* Iterate over each entry to see if at least one matches.
*/
static bool multi_entry_cap_matches(const struct arm64_cpu_capabilities *entry,
int scope)
static bool __maybe_unused
multi_entry_cap_matches(const struct arm64_cpu_capabilities *entry, int scope)
{
const struct arm64_cpu_capabilities *caps;
@ -301,7 +301,7 @@ static bool multi_entry_cap_matches(const struct arm64_cpu_capabilities *entry,
* Take appropriate action for all matching entries in the shared capability
* entry.
*/
static void
static void __maybe_unused
multi_entry_cap_cpu_enable(const struct arm64_cpu_capabilities *entry)
{
const struct arm64_cpu_capabilities *caps;

12
arch/arm64/kernel/cpufeature.c
View File

@ -838,11 +838,6 @@ 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)
{
@ -1022,6 +1017,12 @@ static bool has_hw_dbm(const struct arm64_cpu_capabilities *cap,
#endif
#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)
{
/*
@ -1035,6 +1036,7 @@ static void cpu_copy_el2regs(const struct arm64_cpu_capabilities *__unused)
if (!alternatives_applied)
write_sysreg(read_sysreg(tpidr_el1), tpidr_el2);
}
#endif
static const struct arm64_cpu_capabilities arm64_features[] = {
{