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RISC-V updates for v5.4-rc5 

Several minor fixes and cleanups for v5.4-rc5:
 
 - Three build fixes for various SPARSEMEM-related kernel configurations
 
 - Two cleanup patches for the kernel bug and breakpoint trap handler code
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Merge tag 'riscv/for-v5.4-rc5-b' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Paul Walmsley:
 "Several minor fixes and cleanups for v5.4-rc5:

   - Three build fixes for various SPARSEMEM-related kernel
     configurations

   - Two cleanup patches for the kernel bug and breakpoint trap handler
     code"

* tag 'riscv/for-v5.4-rc5-b' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: cleanup do_trap_break
  riscv: cleanup <asm/bug.h>
  riscv: Fix undefined reference to vmemmap_populate_basepages
  riscv: Fix implicit declaration of 'page_to_section'
  riscv: fix fs/proc/kcore.c compilation with sparsemem enabled
This commit is contained in:
Linus Torvalds 2019-10-27 06:36:57 -04:00
parent 5a1e843c66 e8f44c50df
commit 6995a6a5a5
4 changed files with 11 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/riscv/include/asm/bug.h
View File

@ -12,7 +12,6 @@
#include <asm/asm.h>
#ifdef CONFIG_GENERIC_BUG
#define __INSN_LENGTH_MASK _UL(0x3)
#define __INSN_LENGTH_32 _UL(0x3)
#define __COMPRESSED_INSN_MASK _UL(0xffff)
@ -20,7 +19,6 @@
#define __BUG_INSN_32 _UL(0x00100073) /* ebreak */
#define __BUG_INSN_16 _UL(0x9002) /* c.ebreak */
#ifndef __ASSEMBLY__
typedef u32 bug_insn_t;
#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
@ -43,6 +41,7 @@ typedef u32 bug_insn_t;
RISCV_SHORT " %2"
#endif
#ifdef CONFIG_GENERIC_BUG
#define __BUG_FLAGS(flags) \
do { \
__asm__ __volatile__ ( \
@ -58,14 +57,10 @@ do { \
"i" (flags), \
"i" (sizeof(struct bug_entry))); \
} while (0)
#endif /* !__ASSEMBLY__ */
#else /* CONFIG_GENERIC_BUG */
#ifndef __ASSEMBLY__
#define __BUG_FLAGS(flags) do { \
__asm__ __volatile__ ("ebreak\n"); \
} while (0)
#endif /* !__ASSEMBLY__ */
#endif /* CONFIG_GENERIC_BUG */
#define BUG() do { \
@ -79,15 +74,10 @@ do { \
#include <asm-generic/bug.h>
#ifndef __ASSEMBLY__
struct pt_regs;
struct task_struct;
extern void die(struct pt_regs *regs, const char *str);
extern void do_trap(struct pt_regs *regs, int signo, int code,
unsigned long addr);
#endif /* !__ASSEMBLY__ */
void die(struct pt_regs *regs, const char *str);
void do_trap(struct pt_regs *regs, int signo, int code, unsigned long addr);
#endif /* _ASM_RISCV_BUG_H */

7
arch/riscv/include/asm/pgtable.h
View File

@ -184,10 +184,7 @@ static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
return __pte((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
}
static inline pte_t mk_pte(struct page *page, pgprot_t prot)
{
return pfn_pte(page_to_pfn(page), prot);
}
#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
@ -428,9 +425,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#ifdef CONFIG_FLATMEM
#define kern_addr_valid(addr) (1) /* FIXME */
#endif
extern void *dtb_early_va;
extern void setup_bootmem(void);

26
arch/riscv/kernel/traps.c
View File

@ -111,7 +111,6 @@ DO_ERROR_INFO(do_trap_ecall_s,
DO_ERROR_INFO(do_trap_ecall_m,
SIGILL, ILL_ILLTRP, "environment call from M-mode");
#ifdef CONFIG_GENERIC_BUG
static inline unsigned long get_break_insn_length(unsigned long pc)
{
bug_insn_t insn;
@ -120,28 +119,15 @@ static inline unsigned long get_break_insn_length(unsigned long pc)
return 0;
return (((insn & __INSN_LENGTH_MASK) == __INSN_LENGTH_32) ? 4UL : 2UL);
}
#endif /* CONFIG_GENERIC_BUG */
asmlinkage void do_trap_break(struct pt_regs *regs)
{
if (user_mode(regs)) {
force_sig_fault(SIGTRAP, TRAP_BRKPT,
(void __user *)(regs->sepc));
return;
}
#ifdef CONFIG_GENERIC_BUG
{
enum bug_trap_type type;
type = report_bug(regs->sepc, regs);
if (type == BUG_TRAP_TYPE_WARN) {
regs->sepc += get_break_insn_length(regs->sepc);
return;
}
}
#endif /* CONFIG_GENERIC_BUG */
die(regs, "Kernel BUG");
if (user_mode(regs))
force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->sepc);
else if (report_bug(regs->sepc, regs) == BUG_TRAP_TYPE_WARN)
regs->sepc += get_break_insn_length(regs->sepc);
else
die(regs, "Kernel BUG");
}
#ifdef CONFIG_GENERIC_BUG

2
arch/riscv/mm/init.c
View File

@ -458,7 +458,7 @@ void __init paging_init(void)
zone_sizes_init();
}
#ifdef CONFIG_SPARSEMEM
#ifdef CONFIG_SPARSEMEM_VMEMMAP
int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
struct vmem_altmap *altmap)
{