Commit 24180a60 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'riscv-for-linus-4.16-rc3-riscv_cleanups' of... 

Merge tag 'riscv-for-linus-4.16-rc3-riscv_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux

Pull RISC-V cleanups from Palmer Dabbelt:
 "This contains a handful of small cleanups.

  The only functional change is that IRQs are now enabled during
  exception handling, which was found when some warnings triggered with
  `CONFIG_DEBUG_ATOMIC_SLEEP=y`.

  The remaining fixes should have no functional change: `sbi_save()` has
  been renamed to `parse_dtb()` reflect what it actually does, and a
  handful of unused Kconfig entries have been removed"

* tag 'riscv-for-linus-4.16-rc3-riscv_cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
  Rename sbi_save to parse_dtb to improve code readability
  RISC-V: Enable IRQ during exception handling
  riscv: Remove ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select
  riscv: kconfig: Remove RISCV_IRQ_INTC select
  riscv: Remove ARCH_WANT_OPTIONAL_GPIOLIB select
parents 238ca357 8b08f501

arch/riscv/Kconfig

+0 −3
Original line number Diff line number Diff line
@@ -8,7 +8,6 @@ config RISCV 
	select OF

	select OF_EARLY_FLATTREE

	select OF_IRQ

	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

	select ARCH_WANT_FRAME_POINTERS

	select CLONE_BACKWARDS

	select COMMON_CLK
@@ -20,7 +19,6 @@ config RISCV 
	select GENERIC_STRNLEN_USER

	select GENERIC_SMP_IDLE_THREAD

	select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A

	select ARCH_WANT_OPTIONAL_GPIOLIB

	select HAVE_MEMBLOCK

	select HAVE_MEMBLOCK_NODE_MAP

	select HAVE_DMA_API_DEBUG
@@ -34,7 +32,6 @@ config RISCV 
	select HAVE_ARCH_TRACEHOOK

	select MODULES_USE_ELF_RELA if MODULES

	select THREAD_INFO_IN_TASK

	select RISCV_IRQ_INTC

	select RISCV_TIMER



config MMU

arch/riscv/kernel/entry.S

+3 −2
Original line number Diff line number Diff line
@@ -172,6 +172,9 @@ ENTRY(handle_exception) 
	move a1, sp /* pt_regs */

	tail do_IRQ

1:

	/* Exceptions run with interrupts enabled */

	csrs sstatus, SR_SIE



	/* Handle syscalls */

	li t0, EXC_SYSCALL

	beq s4, t0, handle_syscall
@@ -198,8 +201,6 @@ handle_syscall: 
	 */

	addi s2, s2, 0x4

	REG_S s2, PT_SEPC(sp)

	/* System calls run with interrupts enabled */

	csrs sstatus, SR_SIE

	/* Trace syscalls, but only if requested by the user. */

	REG_L t0, TASK_TI_FLAGS(tp)

	andi t0, t0, _TIF_SYSCALL_TRACE

arch/riscv/kernel/head.S

+1 −1
Original line number Diff line number Diff line
@@ -64,7 +64,7 @@ ENTRY(_start) 
	/* Start the kernel */

	mv a0, s0

	mv a1, s1

	call sbi_save

	call parse_dtb

	tail start_kernel



relocate:

arch/riscv/kernel/setup.c

+1 −1
Original line number Diff line number Diff line
@@ -144,7 +144,7 @@ asmlinkage void __init setup_vm(void) 
#endif

}



void __init sbi_save(unsigned int hartid, void *dtb)

void __init parse_dtb(unsigned int hartid, void *dtb)

{

	early_init_dt_scan(__va(dtb));

}

CRA Git | Maintained and supported by SUSTech CRA and CCSE