diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2014-07-09 11:48:18 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-07-30 18:47:39 (GMT) |
| commit | 064231e548d0ef90453081f424ced7b3ffffffe9 (patch) | |
| tree | 40d8e21d395d879a0a518ed9222872981b401e73 /arch/mips/kernel | |
| parent | 250dc03727b9cce91bd86091f05bf2443e2be9ec (diff) | |
| download | linux-064231e548d0ef90453081f424ced7b3ffffffe9.tar.xz | |
MIPS: pm-cps: Prevent use of mips_cps_* without CPS SMP
These symbols will not be defined when CONFIG_MIPS_CPS=n, but although
the CPS_PM_POWER_GATED state will never be used in that case the
compiler doesn't have enough information to figure that out. Add checks
which evaluate to a constant false for CONFIG_MIPS_CPS=n cases in order
to help the compiler out & eliminate the symbol references.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7278/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/pm-cps.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/kernel/pm-cps.c b/arch/mips/kernel/pm-cps.c index c4c2069..c409a5a 100644 --- a/arch/mips/kernel/pm-cps.c +++ b/arch/mips/kernel/pm-cps.c @@ -149,6 +149,10 @@ int cps_pm_enter_state(enum cps_pm_state state) /* Setup the VPE to run mips_cps_pm_restore when started again */ if (config_enabled(CONFIG_CPU_PM) && state == CPS_PM_POWER_GATED) { + /* Power gating relies upon CPS SMP */ + if (!mips_cps_smp_in_use()) + return -EINVAL; + core_cfg = &mips_cps_core_bootcfg[core]; vpe_cfg = &core_cfg->vpe_config[current_cpu_data.vpe_id]; vpe_cfg->pc = (unsigned long)mips_cps_pm_restore; @@ -376,6 +380,10 @@ static void * __init cps_gen_entry_code(unsigned cpu, enum cps_pm_state state) memset(relocs, 0, sizeof(relocs)); if (config_enabled(CONFIG_CPU_PM) && state == CPS_PM_POWER_GATED) { + /* Power gating relies upon CPS SMP */ + if (!mips_cps_smp_in_use()) + goto out_err; + /* * Save CPU state. Note the non-standard calling convention * with the return address placed in v0 to avoid clobbering |