diff options
Diffstat (limited to 'arch/riscv/include/asm/processor.h')
| -rw-r--r-- | arch/riscv/include/asm/processor.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index 0d13b4497b01..0faf5f161f1e 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -14,12 +14,17 @@ #include <asm/ptrace.h> +/* + * addr is a hint to the maximum userspace address that mmap should provide, so + * this macro needs to return the largest address space available so that + * mmap_end < addr, being mmap_end the top of that address space. + * See Documentation/arch/riscv/vm-layout.rst for more details. + */ #define arch_get_mmap_end(addr, len, flags) \ ({ \ unsigned long mmap_end; \ typeof(addr) _addr = (addr); \ - if ((_addr) == 0 || \ - (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) || \ + if ((_addr) == 0 || is_compat_task() || \ ((_addr + len) > BIT(VA_BITS - 1))) \ mmap_end = STACK_TOP_MAX; \ else \ @@ -33,8 +38,7 @@ typeof(addr) _addr = (addr); \ typeof(base) _base = (base); \ unsigned long rnd_gap = DEFAULT_MAP_WINDOW - (_base); \ - if ((_addr) == 0 || \ - (IS_ENABLED(CONFIG_COMPAT) && is_compat_task()) || \ + if ((_addr) == 0 || is_compat_task() || \ ((_addr + len) > BIT(VA_BITS - 1))) \ mmap_base = (_base); \ else \ |