--- zzzz-none-000/linux-3.10.107/arch/s390/include/asm/percpu.h 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/arch/s390/include/asm/percpu.h 2021-02-04 17:41:59.000000000 +0000 @@ -15,57 +15,120 @@ * per cpu area, use weak definitions to force the compiler to * generate external references. */ -#if defined(CONFIG_SMP) && defined(CONFIG_64BIT) && defined(MODULE) +#if defined(CONFIG_SMP) && defined(MODULE) #define ARCH_NEEDS_WEAK_PER_CPU #endif -#define arch_this_cpu_to_op(pcp, val, op) \ +/* + * We use a compare-and-swap loop since that uses less cpu cycles than + * disabling and enabling interrupts like the generic variant would do. + */ +#define arch_this_cpu_to_op_simple(pcp, val, op) \ ({ \ typedef typeof(pcp) pcp_op_T__; \ pcp_op_T__ old__, new__, prev__; \ pcp_op_T__ *ptr__; \ preempt_disable(); \ - ptr__ = __this_cpu_ptr(&(pcp)); \ + ptr__ = raw_cpu_ptr(&(pcp)); \ prev__ = *ptr__; \ do { \ old__ = prev__; \ new__ = old__ op (val); \ - switch (sizeof(*ptr__)) { \ - case 8: \ - prev__ = cmpxchg64(ptr__, old__, new__); \ - break; \ - default: \ - prev__ = cmpxchg(ptr__, old__, new__); \ - } \ + prev__ = cmpxchg(ptr__, old__, new__); \ } while (prev__ != old__); \ preempt_enable(); \ new__; \ }) -#define this_cpu_add_1(pcp, val) arch_this_cpu_to_op(pcp, val, +) -#define this_cpu_add_2(pcp, val) arch_this_cpu_to_op(pcp, val, +) -#define this_cpu_add_4(pcp, val) arch_this_cpu_to_op(pcp, val, +) -#define this_cpu_add_8(pcp, val) arch_this_cpu_to_op(pcp, val, +) - -#define this_cpu_add_return_1(pcp, val) arch_this_cpu_to_op(pcp, val, +) -#define this_cpu_add_return_2(pcp, val) arch_this_cpu_to_op(pcp, val, +) -#define this_cpu_add_return_4(pcp, val) arch_this_cpu_to_op(pcp, val, +) -#define this_cpu_add_return_8(pcp, val) arch_this_cpu_to_op(pcp, val, +) - -#define this_cpu_and_1(pcp, val) arch_this_cpu_to_op(pcp, val, &) -#define this_cpu_and_2(pcp, val) arch_this_cpu_to_op(pcp, val, &) -#define this_cpu_and_4(pcp, val) arch_this_cpu_to_op(pcp, val, &) -#define this_cpu_and_8(pcp, val) arch_this_cpu_to_op(pcp, val, &) - -#define this_cpu_or_1(pcp, val) arch_this_cpu_to_op(pcp, val, |) -#define this_cpu_or_2(pcp, val) arch_this_cpu_to_op(pcp, val, |) -#define this_cpu_or_4(pcp, val) arch_this_cpu_to_op(pcp, val, |) -#define this_cpu_or_8(pcp, val) arch_this_cpu_to_op(pcp, val, |) - -#define this_cpu_xor_1(pcp, val) arch_this_cpu_to_op(pcp, val, ^) -#define this_cpu_xor_2(pcp, val) arch_this_cpu_to_op(pcp, val, ^) -#define this_cpu_xor_4(pcp, val) arch_this_cpu_to_op(pcp, val, ^) -#define this_cpu_xor_8(pcp, val) arch_this_cpu_to_op(pcp, val, ^) +#define this_cpu_add_1(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_add_2(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_add_return_1(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_add_return_2(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_and_1(pcp, val) arch_this_cpu_to_op_simple(pcp, val, &) +#define this_cpu_and_2(pcp, val) arch_this_cpu_to_op_simple(pcp, val, &) +#define this_cpu_or_1(pcp, val) arch_this_cpu_to_op_simple(pcp, val, |) +#define this_cpu_or_2(pcp, val) arch_this_cpu_to_op_simple(pcp, val, |) + +#ifndef CONFIG_HAVE_MARCH_Z196_FEATURES + +#define this_cpu_add_4(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_add_8(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_add_return_4(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_add_return_8(pcp, val) arch_this_cpu_to_op_simple(pcp, val, +) +#define this_cpu_and_4(pcp, val) arch_this_cpu_to_op_simple(pcp, val, &) +#define this_cpu_and_8(pcp, val) arch_this_cpu_to_op_simple(pcp, val, &) +#define this_cpu_or_4(pcp, val) arch_this_cpu_to_op_simple(pcp, val, |) +#define this_cpu_or_8(pcp, val) arch_this_cpu_to_op_simple(pcp, val, |) + +#else /* CONFIG_HAVE_MARCH_Z196_FEATURES */ + +#define arch_this_cpu_add(pcp, val, op1, op2, szcast) \ +{ \ + typedef typeof(pcp) pcp_op_T__; \ + pcp_op_T__ val__ = (val); \ + pcp_op_T__ old__, *ptr__; \ + preempt_disable(); \ + ptr__ = raw_cpu_ptr(&(pcp)); \ + if (__builtin_constant_p(val__) && \ + ((szcast)val__ > -129) && ((szcast)val__ < 128)) { \ + asm volatile( \ + op2 " %[ptr__],%[val__]\n" \ + : [ptr__] "+Q" (*ptr__) \ + : [val__] "i" ((szcast)val__) \ + : "cc"); \ + } else { \ + asm volatile( \ + op1 " %[old__],%[val__],%[ptr__]\n" \ + : [old__] "=d" (old__), [ptr__] "+Q" (*ptr__) \ + : [val__] "d" (val__) \ + : "cc"); \ + } \ + preempt_enable(); \ +} + +#define this_cpu_add_4(pcp, val) arch_this_cpu_add(pcp, val, "laa", "asi", int) +#define this_cpu_add_8(pcp, val) arch_this_cpu_add(pcp, val, "laag", "agsi", long) + +#define arch_this_cpu_add_return(pcp, val, op) \ +({ \ + typedef typeof(pcp) pcp_op_T__; \ + pcp_op_T__ val__ = (val); \ + pcp_op_T__ old__, *ptr__; \ + preempt_disable(); \ + ptr__ = raw_cpu_ptr(&(pcp)); \ + asm volatile( \ + op " %[old__],%[val__],%[ptr__]\n" \ + : [old__] "=d" (old__), [ptr__] "+Q" (*ptr__) \ + : [val__] "d" (val__) \ + : "cc"); \ + preempt_enable(); \ + old__ + val__; \ +}) + +#define this_cpu_add_return_4(pcp, val) arch_this_cpu_add_return(pcp, val, "laa") +#define this_cpu_add_return_8(pcp, val) arch_this_cpu_add_return(pcp, val, "laag") + +#define arch_this_cpu_to_op(pcp, val, op) \ +{ \ + typedef typeof(pcp) pcp_op_T__; \ + pcp_op_T__ val__ = (val); \ + pcp_op_T__ old__, *ptr__; \ + preempt_disable(); \ + ptr__ = raw_cpu_ptr(&(pcp)); \ + asm volatile( \ + op " %[old__],%[val__],%[ptr__]\n" \ + : [old__] "=d" (old__), [ptr__] "+Q" (*ptr__) \ + : [val__] "d" (val__) \ + : "cc"); \ + preempt_enable(); \ +} + +#define this_cpu_and_4(pcp, val) arch_this_cpu_to_op(pcp, val, "lan") +#define this_cpu_and_8(pcp, val) arch_this_cpu_to_op(pcp, val, "lang") +#define this_cpu_or_4(pcp, val) arch_this_cpu_to_op(pcp, val, "lao") +#define this_cpu_or_8(pcp, val) arch_this_cpu_to_op(pcp, val, "laog") + +#endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */ #define arch_this_cpu_cmpxchg(pcp, oval, nval) \ ({ \ @@ -73,14 +136,8 @@ pcp_op_T__ ret__; \ pcp_op_T__ *ptr__; \ preempt_disable(); \ - ptr__ = __this_cpu_ptr(&(pcp)); \ - switch (sizeof(*ptr__)) { \ - case 8: \ - ret__ = cmpxchg64(ptr__, oval, nval); \ - break; \ - default: \ - ret__ = cmpxchg(ptr__, oval, nval); \ - } \ + ptr__ = raw_cpu_ptr(&(pcp)); \ + ret__ = cmpxchg(ptr__, oval, nval); \ preempt_enable(); \ ret__; \ }) @@ -95,7 +152,7 @@ typeof(pcp) *ptr__; \ typeof(pcp) ret__; \ preempt_disable(); \ - ptr__ = __this_cpu_ptr(&(pcp)); \ + ptr__ = raw_cpu_ptr(&(pcp)); \ ret__ = xchg(ptr__, nval); \ preempt_enable(); \ ret__; \ @@ -104,9 +161,7 @@ #define this_cpu_xchg_1(pcp, nval) arch_this_cpu_xchg(pcp, nval) #define this_cpu_xchg_2(pcp, nval) arch_this_cpu_xchg(pcp, nval) #define this_cpu_xchg_4(pcp, nval) arch_this_cpu_xchg(pcp, nval) -#ifdef CONFIG_64BIT #define this_cpu_xchg_8(pcp, nval) arch_this_cpu_xchg(pcp, nval) -#endif #define arch_this_cpu_cmpxchg_double(pcp1, pcp2, o1, o2, n1, n2) \ ({ \ @@ -116,17 +171,15 @@ typeof(pcp2) *p2__; \ int ret__; \ preempt_disable(); \ - p1__ = __this_cpu_ptr(&(pcp1)); \ - p2__ = __this_cpu_ptr(&(pcp2)); \ + p1__ = raw_cpu_ptr(&(pcp1)); \ + p2__ = raw_cpu_ptr(&(pcp2)); \ ret__ = __cmpxchg_double(p1__, p2__, o1__, o2__, n1__, n2__); \ preempt_enable(); \ ret__; \ }) #define this_cpu_cmpxchg_double_4 arch_this_cpu_cmpxchg_double -#ifdef CONFIG_64BIT #define this_cpu_cmpxchg_double_8 arch_this_cpu_cmpxchg_double -#endif #include