ARM development updates:
- more unified assembly conversions for clang - drop obsolete -mauto-it assembler option - remove arm_memory_present in preference to the generic version - remove unused asm/limits.h header - vdso linker update We tried to make the assembler warn if unified syntax was not used, but unfortunately older versions of GCC warn, so the commit had to be reverted. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUAXNyRJfTnkBvkraxkAQLy9w/+IZ17YCke7L1Lrk/cbV72RbMPEK4LOJD/ H2JP7GNJPa7JXsAohOELtYav6xsOxERtDkHmplcsRkl519kEfKU7wgjFNGoVUHpk s+urcDIkijdNMXHvyBY4pSy54b8OmUAdeGnpgkMfQ+2gmKSTd9iXXOFfAvi8qDGI F13xXCL3XbbC/9tPmSFS04jmseaDIE5qW9GhrQ3n4qmwx5tx3e6IuWZ1G2UPqAly vjIuRKR2PrGW2ORoPklJ1VPjPjV5eaxP9+YPhCMMIH5MtCOM8K+me0ldbZvrSqu1 b1ovjuWrLdFXBVRUI3yRM3aAM83ZuV3jLWF7+2QtDZCAMMND9FnCOTq4cvHW0Hno HVkYmUFJA5nV4Z62K9buR65gA3gFTmbDBO3NupoXw1KdIUONv/vHt9dA1E6tA4iE oaRK60Uoi2a2FzFp+jsDDNGKJP9eMJS3oDmgVa2UOI0L+oyPsZXM95g7+CJ2Yr5G +oLUfDhhWyrYVTjXd6ZZSCqbQgrbrSslxN0nSjcFb/tO7K5zcAWGWRW/KDxjVlvO ElJXgxNa6RvTT6Lt+zDLEFRxWiBfADQYSoQYXrBLSuEG85/7HJg/9gTbbHFEGfBw IqHvBut/wwArNBkkz2OFjyn0z3vrIr5PwdXs2K49ywlfHHvDxGSEovvYv7kFTuTR hVBSmogtt7U= =719N -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm Pull ARM updates from Russell King: "ARM development updates: - more unified assembly conversions for clang - drop obsolete -mauto-it assembler option - remove arm_memory_present in preference to the generic version - remove unused asm/limits.h header - vdso linker update We tried to make the assembler warn if unified syntax was not used, but unfortunately older versions of GCC warn, so the commit had to be reverted" * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: Revert "ARM: 8846/1: warn if divided syntax assembler is used" ARM: 8858/1: vdso: use $(LD) instead of $(CC) to link VDSO ARM: 8855/1: remove unused <asm/limits.h> ARM: 8850/1: use memblocks_present ARM: 8854/1: drop -mauto-it ARM: 8846/1: warn if divided syntax assembler is used ARM: 8853/1: drop WASM to work around LLVM issue ARM: 8852/1: uaccess: use unified assembler language syntax ARM: 8851/1: add TUSERCOND() macro for conditional postfix
This commit is contained in:
Linus Torvalds
Коммит
8c05f3b965
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@ -116,8 +116,7 @@ endif
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AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
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ifeq ($(CONFIG_THUMB2_KERNEL),y)
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AFLAGS_AUTOIT :=$(call as-option,-Wa$(comma)-mimplicit-it=always,-Wa$(comma)-mauto-it)
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CFLAGS_ISA :=-mthumb $(AFLAGS_AUTOIT) $(AFLAGS_NOWARN)
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CFLAGS_ISA :=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
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AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
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# Work around buggy relocation from gas if requested:
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ifeq ($(CONFIG_THUMB2_AVOID_R_ARM_THM_JUMP11),y)
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@ -133,9 +133,11 @@ static inline void modify_domain(unsigned dom, unsigned type) { }
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* instructions (inline assembly)
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*/
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#ifdef CONFIG_CPU_USE_DOMAINS
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#define TUSER(instr) #instr "t"
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#define TUSER(instr) TUSERCOND(instr, )
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#define TUSERCOND(instr, cond) #instr "t" #cond
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#else
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#define TUSER(instr) #instr
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#define TUSER(instr) TUSERCOND(instr, )
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#define TUSERCOND(instr, cond) #instr #cond
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#endif
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#else /* __ASSEMBLY__ */
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@ -110,10 +110,11 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
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preempt_disable();
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__ua_flags = uaccess_save_and_enable();
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__asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
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" .syntax unified\n"
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"1: " TUSER(ldr) " %1, [%4]\n"
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" teq %1, %2\n"
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" it eq @ explicit IT needed for the 2b label\n"
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"2: " TUSER(streq) " %3, [%4]\n"
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"2: " TUSERCOND(str, eq) " %3, [%4]\n"
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__futex_atomic_ex_table("%5")
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: "+r" (ret), "=&r" (val)
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: "r" (oldval), "r" (newval), "r" (uaddr), "Ir" (-EFAULT)
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@ -1,12 +0,0 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_PIPE_H
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#define __ASM_PIPE_H
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#ifndef PAGE_SIZE
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#include <asm/page.h>
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#endif
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#define PIPE_BUF PAGE_SIZE
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#endif
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@ -135,8 +135,8 @@ static inline void prefetchw(const void *ptr)
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__asm__ __volatile__(
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".arch_extension mp\n"
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__ALT_SMP_ASM(
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WASM(pldw) "\t%a0",
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WASM(pld) "\t%a0"
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"pldw\t%a0",
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"pld\t%a0"
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)
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:: "p" (ptr));
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}
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@ -112,10 +112,11 @@ static inline void __user *__uaccess_mask_range_ptr(const void __user *ptr,
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unsigned long tmp;
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asm volatile(
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" .syntax unified\n"
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" sub %1, %3, #1\n"
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" subs %1, %1, %0\n"
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" addhs %1, %1, #1\n"
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" subhss %1, %1, %2\n"
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" subshs %1, %1, %2\n"
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" movlo %0, #0\n"
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: "+r" (safe_ptr), "=&r" (tmp)
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: "r" (size), "r" (current_thread_info()->addr_limit)
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@ -182,21 +182,6 @@ int pfn_valid(unsigned long pfn)
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EXPORT_SYMBOL(pfn_valid);
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#endif
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#ifndef CONFIG_SPARSEMEM
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static void __init arm_memory_present(void)
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{
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}
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#else
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static void __init arm_memory_present(void)
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{
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struct memblock_region *reg;
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for_each_memblock(memory, reg)
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memory_present(0, memblock_region_memory_base_pfn(reg),
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memblock_region_memory_end_pfn(reg));
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}
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#endif
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static bool arm_memblock_steal_permitted = true;
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phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
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@ -293,7 +278,7 @@ void __init bootmem_init(void)
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* Sparsemem tries to allocate bootmem in memory_present(),
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* so must be done after the fixed reservations
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*/
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arm_memory_present();
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memblocks_present();
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/*
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* sparse_init() needs the bootmem allocator up and running.
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@ -10,12 +10,12 @@ obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
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ccflags-y := -fPIC -fno-common -fno-builtin -fno-stack-protector
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ccflags-y += -DDISABLE_BRANCH_PROFILING
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VDSO_LDFLAGS := -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
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VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
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VDSO_LDFLAGS += -nostdlib -shared
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VDSO_LDFLAGS += $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
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VDSO_LDFLAGS += $(call cc-ldoption, -Wl$(comma)--build-id)
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VDSO_LDFLAGS += $(call cc-ldoption, -fuse-ld=bfd)
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ldflags-y = -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
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-z max-page-size=4096 -z common-page-size=4096 \
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-nostdlib -shared \
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$(call ld-option, --hash-style=sysv) \
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$(call ld-option, --build-id) \
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-T
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obj-$(CONFIG_VDSO) += vdso.o
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extra-$(CONFIG_VDSO) += vdso.lds
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@ -37,8 +37,8 @@ KCOV_INSTRUMENT := n
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$(obj)/vdso.o : $(obj)/vdso.so
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# Link rule for the .so file
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$(obj)/vdso.so.raw: $(src)/vdso.lds $(obj-vdso) FORCE
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$(call if_changed,vdsold)
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$(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso) FORCE
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$(call if_changed,ld)
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$(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/vdsomunge FORCE
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$(call if_changed,vdsomunge)
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@ -48,11 +48,6 @@ $(obj)/%.so: OBJCOPYFLAGS := -S
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$(obj)/%.so: $(obj)/%.so.dbg FORCE
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$(call if_changed,objcopy)
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# Actual build commands
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quiet_cmd_vdsold = VDSO $@
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cmd_vdsold = $(CC) $(c_flags) $(VDSO_LDFLAGS) \
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-Wl,-T $(filter %.lds,$^) $(filter %.o,$^) -o $@
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quiet_cmd_vdsomunge = MUNGE $@
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cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@
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