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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH] xen/treewide: More typeof() -> auto conversions
Hi Andrew, > On 27 Jan 2026, at 11:18, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote: > > All of these are simple cases of using typeof() to avoid multiple parameter > evaluation. Using auto avoids multiple textural expansion also. > > No functional change. > > Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Compiles and boot on arm: For arm: Acked-by: Bertrand Marquis <bertrand.marquis@xxxxxxx> > --- > CC: Anthony PERARD <anthony.perard@xxxxxxxxxx> > CC: Michal Orzel <michal.orzel@xxxxxxx> > CC: Jan Beulich <jbeulich@xxxxxxxx> > CC: Julien Grall <julien@xxxxxxx> > CC: Roger Pau Monné <roger.pau@xxxxxxxxxx> > CC: Stefano Stabellini <sstabellini@xxxxxxxxxx> > CC: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx> > CC: Bertrand Marquis <bertrand.marquis@xxxxxxx> > > There's an oddity with SMCCC. 4 or fewer args strictly use unsigned long for > ouput types where 5 or more use a dynamic type. I've left it as-was, but it > looks wrong. I will have a look at that, thanks for the notice. Bertrand > > https://gitlab.com/xen-project/hardware/xen-staging/-/pipelines/2287583251 > --- > xen/arch/arm/include/asm/smccc.h | 26 +++---- > xen/arch/x86/include/asm/alternative-call.h | 84 ++++++++++----------- > xen/common/bitops.c | 2 +- > xen/include/xen/bitops.h | 4 +- > xen/include/xen/nospec.h | 4 +- > xen/include/xen/self-tests.h | 4 +- > 6 files changed, 62 insertions(+), 62 deletions(-) > > diff --git a/xen/arch/arm/include/asm/smccc.h > b/xen/arch/arm/include/asm/smccc.h > index 441b3ab65dee..29f1128bc283 100644 > --- a/xen/arch/arm/include/asm/smccc.h > +++ b/xen/arch/arm/include/asm/smccc.h > @@ -129,7 +129,7 @@ struct arm_smccc_res { > register unsigned long r3 ASM_REG(3) > > #define __declare_arg_1(a0, a1, res) \ > - typeof(a1) __a1 = (a1); \ > + auto __a1 = (a1); \ > struct arm_smccc_res *___res = (res); \ > register unsigned long r0 ASM_REG(0) = (uint32_t)(a0); \ > register unsigned long r1 ASM_REG(1) = __a1; \ > @@ -137,8 +137,8 @@ struct arm_smccc_res { > register unsigned long r3 ASM_REG(3) > > #define __declare_arg_2(a0, a1, a2, res) \ > - typeof(a1) __a1 = (a1); \ > - typeof(a2) __a2 = (a2); \ > + auto __a1 = (a1); \ > + auto __a2 = (a2); \ > struct arm_smccc_res *___res = (res); \ > register unsigned long r0 ASM_REG(0) = (uint32_t)(a0); \ > register unsigned long r1 ASM_REG(1) = __a1; \ > @@ -146,9 +146,9 @@ struct arm_smccc_res { > register unsigned long r3 ASM_REG(3) > > #define __declare_arg_3(a0, a1, a2, a3, res) \ > - typeof(a1) __a1 = (a1); \ > - typeof(a2) __a2 = (a2); \ > - typeof(a3) __a3 = (a3); \ > + auto __a1 = (a1); \ > + auto __a2 = (a2); \ > + auto __a3 = (a3); \ > struct arm_smccc_res *___res = (res); \ > register unsigned long r0 ASM_REG(0) = (uint32_t)(a0); \ > register unsigned long r1 ASM_REG(1) = __a1; \ > @@ -156,24 +156,24 @@ struct arm_smccc_res { > register unsigned long r3 ASM_REG(3) = __a3 > > #define __declare_arg_4(a0, a1, a2, a3, a4, res) \ > - typeof(a4) __a4 = (a4); \ > + auto __a4 = (a4); \ > __declare_arg_3(a0, a1, a2, a3, res); \ > register unsigned long r4 ASM_REG(4) = __a4 > > #define __declare_arg_5(a0, a1, a2, a3, a4, a5, res) \ > - typeof(a5) __a5 = (a5); \ > + auto __a5 = (a5); \ > __declare_arg_4(a0, a1, a2, a3, a4, res); \ > - register typeof(a5) r5 ASM_REG(5) = __a5 > + register auto r5 ASM_REG(5) = __a5 > > #define __declare_arg_6(a0, a1, a2, a3, a4, a5, a6, res) \ > - typeof(a6) __a6 = (a6); \ > + auto __a6 = (a6); \ > __declare_arg_5(a0, a1, a2, a3, a4, a5, res); \ > - register typeof(a6) r6 ASM_REG(6) = __a6 > + register auto r6 ASM_REG(6) = __a6 > > #define __declare_arg_7(a0, a1, a2, a3, a4, a5, a6, a7, res) \ > - typeof(a7) __a7 = (a7); \ > + auto __a7 = (a7); \ > __declare_arg_6(a0, a1, a2, a3, a4, a5, a6, res); \ > - register typeof(a7) r7 ASM_REG(7) = __a7 > + register auto r7 ASM_REG(7) = __a7 > > #define ___declare_args(count, ...) __declare_arg_ ## count(__VA_ARGS__) > #define __declare_args(count, ...) ___declare_args(count, __VA_ARGS__) > diff --git a/xen/arch/x86/include/asm/alternative-call.h > b/xen/arch/x86/include/asm/alternative-call.h > index b22c10c32283..27024797f584 100644 > --- a/xen/arch/x86/include/asm/alternative-call.h > +++ b/xen/arch/x86/include/asm/alternative-call.h > @@ -111,7 +111,7 @@ struct alt_call { > }) > > #define alternative_vcall1(func, arg) ({ \ > - typeof(arg) v1_ = (arg); \ > + auto v1_ = (arg); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_NO_ARG2; \ > (void)sizeof(func(arg)); \ > @@ -119,15 +119,15 @@ struct alt_call { > }) > > #define alternative_call1(func, arg) ({ \ > - typeof(arg) v1_ = (arg); \ > + auto v1_ = (arg); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_NO_ARG2; \ > alternative_callN(1, typeof(func(arg)), func); \ > }) > > #define alternative_vcall2(func, arg1, arg2) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_NO_ARG3; \ > @@ -136,8 +136,8 @@ struct alt_call { > }) > > #define alternative_call2(func, arg1, arg2) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_NO_ARG3; \ > @@ -145,9 +145,9 @@ struct alt_call { > }) > > #define alternative_vcall3(func, arg1, arg2, arg3) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > @@ -157,9 +157,9 @@ struct alt_call { > }) > > #define alternative_call3(func, arg1, arg2, arg3) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > @@ -169,10 +169,10 @@ struct alt_call { > }) > > #define alternative_vcall4(func, arg1, arg2, arg3, arg4) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > - typeof(arg4) v4_ = (arg4); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > + auto v4_ = (arg4); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > @@ -183,10 +183,10 @@ struct alt_call { > }) > > #define alternative_call4(func, arg1, arg2, arg3, arg4) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > - typeof(arg4) v4_ = (arg4); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > + auto v4_ = (arg4); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > @@ -198,11 +198,11 @@ struct alt_call { > }) > > #define alternative_vcall5(func, arg1, arg2, arg3, arg4, arg5) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > - typeof(arg4) v4_ = (arg4); \ > - typeof(arg5) v5_ = (arg5); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > + auto v4_ = (arg4); \ > + auto v5_ = (arg5); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > @@ -214,11 +214,11 @@ struct alt_call { > }) > > #define alternative_call5(func, arg1, arg2, arg3, arg4, arg5) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > - typeof(arg4) v4_ = (arg4); \ > - typeof(arg5) v5_ = (arg5); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > + auto v4_ = (arg4); \ > + auto v5_ = (arg5); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > @@ -231,12 +231,12 @@ struct alt_call { > }) > > #define alternative_vcall6(func, arg1, arg2, arg3, arg4, arg5, arg6) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > - typeof(arg4) v4_ = (arg4); \ > - typeof(arg5) v5_ = (arg5); \ > - typeof(arg6) v6_ = (arg6); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > + auto v4_ = (arg4); \ > + auto v5_ = (arg5); \ > + auto v6_ = (arg6); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > @@ -248,12 +248,12 @@ struct alt_call { > }) > > #define alternative_call6(func, arg1, arg2, arg3, arg4, arg5, arg6) ({ \ > - typeof(arg1) v1_ = (arg1); \ > - typeof(arg2) v2_ = (arg2); \ > - typeof(arg3) v3_ = (arg3); \ > - typeof(arg4) v4_ = (arg4); \ > - typeof(arg5) v5_ = (arg5); \ > - typeof(arg6) v6_ = (arg6); \ > + auto v1_ = (arg1); \ > + auto v2_ = (arg2); \ > + auto v3_ = (arg3); \ > + auto v4_ = (arg4); \ > + auto v5_ = (arg5); \ > + auto v6_ = (arg6); \ > ALT_CALL_ARG(v1_, 1); \ > ALT_CALL_ARG(v2_, 2); \ > ALT_CALL_ARG(v3_, 3); \ > diff --git a/xen/common/bitops.c b/xen/common/bitops.c > index e46ea1d3ecf8..859a4ca5c131 100644 > --- a/xen/common/bitops.c > +++ b/xen/common/bitops.c > @@ -147,7 +147,7 @@ static void __init test_for_each_set_bit(void) > * A copy of @val is taken internally. > */ > #define for_each_set_bit_reverse(iter, val) \ > - for ( typeof(val) __v = (val); __v; __v = 0 ) \ > + for ( auto __v = (val); __v; __v = 0 ) \ > for ( unsigned int (iter); \ > __v && ((iter) = fls_g(__v) - 1, true); \ > __clear_bit(iter, &__v) ) > diff --git a/xen/include/xen/bitops.h b/xen/include/xen/bitops.h > index a4d31ec02a7c..24882fb4822d 100644 > --- a/xen/include/xen/bitops.h > +++ b/xen/include/xen/bitops.h > @@ -299,7 +299,7 @@ static always_inline attr_const unsigned int > fls64(uint64_t x) > * A copy of @val is taken internally. > */ > #define for_each_set_bit(iter, val) \ > - for ( typeof(val) __v = (val); __v; __v = 0 ) \ > + for ( auto __v = (val); __v; __v = 0 ) \ > for ( unsigned int (iter); \ > __v && ((iter) = ffs_g(__v) - 1, true); \ > __v &= __v - 1 ) > @@ -310,7 +310,7 @@ static always_inline attr_const unsigned int > fls64(uint64_t x) > */ > #define multiple_bits_set(x) \ > ({ \ > - typeof(x) _v = (x); \ > + auto _v = (x); \ > (_v & (_v - 1)) != 0; \ > }) > > diff --git a/xen/include/xen/nospec.h b/xen/include/xen/nospec.h > index c8167a8a245c..0e474145b476 100644 > --- a/xen/include/xen/nospec.h > +++ b/xen/include/xen/nospec.h > @@ -51,8 +51,8 @@ static inline unsigned long > array_index_mask_nospec(unsigned long index, > */ > #define array_index_nospec(index, size) \ > ({ \ > - typeof(index) _i = (index); \ > - typeof(size) _s = (size); \ > + auto _i = (index); \ > + auto _s = (size); \ > unsigned long _mask = array_index_mask_nospec(_i, _s); \ > \ > BUILD_BUG_ON(sizeof(_i) > sizeof(long)); \ > diff --git a/xen/include/xen/self-tests.h b/xen/include/xen/self-tests.h > index c57cceb3b962..c4937e781f66 100644 > --- a/xen/include/xen/self-tests.h > +++ b/xen/include/xen/self-tests.h > @@ -18,7 +18,7 @@ > */ > #define COMPILE_CHECK(fn, val, res) \ > do { \ > - typeof(fn(val)) real = fn(val); \ > + auto real = fn(val); \ > \ > if ( !__builtin_constant_p(real) ) \ > BUILD_ERROR("'" STR(fn(val)) "' not compile-time constant"); \ > @@ -36,7 +36,7 @@ > */ > #define RUNTIME_CHECK(fn, val, res) \ > do { \ > - typeof(fn(val)) real = fn(HIDE(val)); \ > + auto real = fn(HIDE(val)); \ > \ > if ( real != (res) ) \ > panic("%s: %s(%s) expected %u, got %u\n", \ > -- > 2.39.5 >
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