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52e7c52d2d
linux/arch/riscv/include/asm
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Palmer Dabbelt 52e7c52d2d
RISC-V: Stop relying on GCC's register allocator's hueristics 
GCC allows users to hint to the register allocation that a variable should be
placed in a register by using a syntax along the lines of

    function(...) {
        register long in_REG __asm__("REG");
    }

We've abused this a bit throughout the RISC-V port to access fixed registers
directly as C variables.  In practice it's never going to blow up because GCC
isn't going to allocate these registers, but it's not a well defined syntax so
we really shouldn't be relying upon this.  Luckily there is a very similar but
well defined syntax that allows us to still access these registers directly as
C variables, which is to simply declare the register variables globally.  For
fixed variables this doesn't change the ABI.

LLVM disallows this ambiguous syntax, so this isn't just strictly a formatting
change.

Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-03-03 10:28:13 -08:00
..
asm-offsets.h
asm-prototypes.h riscv: Less inefficient gcc tishift helpers (and export their symbols) 2020-01-18 19:13:41 -08:00
asm.h RISC-V: Clear load reservations while restoring hart contexts 2019-10-01 13:16:40 -07:00
atomic.h locking/atomic, riscv: Use s64 for atomic64 2019-06-03 12:32:56 +02:00
barrier.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
bitops.h RISC-V patches for v5.2-rc6 2019-06-17 10:34:03 -07:00
bug.h riscv: cleanup <asm/bug.h> 2019-10-23 14:53:46 -07:00
cache.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
cacheflush.h riscv: Use flush_icache_mm for flush_icache_user_range 2020-03-03 10:28:10 -08:00
clint.h riscv: provide native clint access for M-mode 2019-11-17 15:17:39 -08:00
cmpxchg.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
csr.h riscv: set pmp configuration if kernel is running in M-mode 2020-02-18 09:41:24 -08:00
current.h RISC-V: Stop relying on GCC's register allocator's hueristics 2020-03-03 10:28:13 -08:00
delay.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
elf.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
fence.h riscv/spinlock: Strengthen implementations with fences 2018-04-02 19:59:43 -07:00
fixmap.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
ftrace.h riscv: clean up the macro format in each header file 2019-11-12 12:04:52 -08:00
futex.h Merge branch 'next/nommu' into for-next 2019-11-22 18:59:09 -08:00
hugetlb.h riscv: Introduce huge page support for 32/64bit kernel 2019-07-03 15:23:38 -07:00
hwcap.h riscv: clean up the macro format in each header file 2019-11-12 12:04:52 -08:00
image.h RISC-V: Typo fixes in image header and documentation. 2019-12-19 09:32:45 -07:00
io.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
irq.h riscv: add missing header file includes 2019-10-28 00:46:01 -07:00
irqflags.h riscv: abstract out CSR names for supervisor vs machine mode 2019-11-05 09:20:42 -08:00
kasan.h riscv: Add KASAN support 2020-01-22 13:09:58 -08:00
Kbuild asm-generic: Make dma-contiguous.h a mandatory include/asm header 2020-02-04 11:38:59 +01:00
kprobes.h riscv: clean up the macro format in each header file 2019-11-12 12:04:52 -08:00
linkage.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
mmio.h generic ioremap support 2019-11-28 10:57:12 -08:00
mmiowb.h riscv: clean up the macro format in each header file 2019-11-12 12:04:52 -08:00
mmu_context.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
mmu.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
module.h RISC-V: Support MODULE_SECTIONS mechanism on RV32 2019-01-07 08:19:20 -08:00
page.h riscv: mm: add support for CONFIG_DEBUG_VIRTUAL 2020-01-23 10:40:06 -08:00
pci.h riscv: clean up the macro format in each header file 2019-11-12 12:04:52 -08:00
perf_event.h riscv, perf: Add arch specific perf_arch_bpf_user_pt_regs 2019-12-19 16:03:31 +01:00
pgalloc.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
pgtable-32.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
pgtable-64.h riscv: mm: add p?d_leaf() definitions 2020-02-04 03:05:24 +00:00
pgtable-bits.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
pgtable.h riscv: mm: add p?d_leaf() definitions 2020-02-04 03:05:24 +00:00
processor.h riscv: abstract out CSR names for supervisor vs machine mode 2019-11-05 09:20:42 -08:00
ptrace.h riscv: abstract out CSR names for supervisor vs machine mode 2019-11-05 09:20:42 -08:00
sbi.h riscv: provide native clint access for M-mode 2019-11-17 15:17:39 -08:00
seccomp.h riscv: add support for SECCOMP and SECCOMP_FILTER 2019-10-29 11:32:10 -07:00
smp.h riscv: cleanup riscv_cpuid_to_hartid_mask 2019-09-05 01:51:57 -07:00
sparsemem.h riscv: clean up the macro format in each header file 2019-11-12 12:04:52 -08:00
spinlock_types.h riscv: clean up the macro format in each header file 2019-11-12 12:04:52 -08:00
spinlock.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
string.h riscv: Add KASAN support 2020-01-22 13:09:58 -08:00
switch_to.h riscv: abstract out CSR names for supervisor vs machine mode 2019-11-05 09:20:42 -08:00
syscall.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
thread_info.h riscv: add support for SECCOMP and SECCOMP_FILTER 2019-10-29 11:32:10 -07:00
timex.h riscv: add support for MMIO access to the timer registers 2019-11-13 14:10:40 -08:00
tlb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
tlbflush.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
uaccess.h riscv: add nommu support 2019-11-17 15:17:39 -08:00
unistd.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00
vdso.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00
word-at-a-time.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286 2019-06-05 17:36:37 +02:00