diff options
Diffstat (limited to 'arch/arc/kernel/setup.c')
| -rw-r--r-- | arch/arc/kernel/setup.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index 7b2340996cf8..2266e4ee4142 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -263,7 +263,7 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len) { struct cpuinfo_arc *cpu = &cpuinfo_arc700[cpu_id]; struct bcr_identity *core = &cpu->core; - int i, n = 0, ua = 0; + int n = 0; FIX_PTR(cpu); @@ -283,16 +283,23 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len) IS_AVAIL2(cpu->extn.rtc, "RTC [UP 64-bit] ", CONFIG_ARC_TIMERS_64BIT), IS_AVAIL2(cpu->extn.gfrc, "GFRC [SMP 64-bit] ", CONFIG_ARC_TIMERS_64BIT)); -#ifdef __ARC_UNALIGNED__ - ua = 1; + n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s", + IS_AVAIL2(cpu->isa.atomic, "atomic ", CONFIG_ARC_HAS_LLSC), + IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64), + IS_AVAIL2(cpu->isa.unalign, "unalign ", CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS)); + +#if defined(__ARC_UNALIGNED__) && !defined(CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS) + /* + * gcc 7.3.1 (GNU 2018.03) onwards generate unaligned access by default + * but -mno-unaligned-access to disable that didn't work until gcc 8.2.1 + * (GNU 2019.03). So landing here implies the interim period, when + * despite Kconfig being off, gcc is generating unaligned accesses which + * could bomb later on. So better to disallow such broken builds + */ + BUILD_BUG_ON_MSG(1, "gcc doesn't support -mno-unaligned-access"); #endif - n += i = scnprintf(buf + n, len - n, "%s%s%s%s%s%s", - IS_AVAIL2(cpu->isa.atomic, "atomic ", CONFIG_ARC_HAS_LLSC), - IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64), - IS_AVAIL1(cpu->isa.unalign, "unalign "), IS_USED_RUN(ua)); - if (i) - n += scnprintf(buf + n, len - n, "\n\t\t: "); + n += scnprintf(buf + n, len - n, "\n\t\t: "); if (cpu->extn_mpy.ver) { if (cpu->extn_mpy.ver <= 0x2) { /* ARCompact */ |