NIOS2: update for v6.18

- Replace __ASSEMBLY__ with __ASSEMBLER__ in headers
 - Set memblock.current_limit when setting pfn limits
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Merge tag 'nios2_update_for_v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux

Pull NIOS2 updates from Dinh Nguyen:

 - Replace __ASSEMBLY__ with __ASSEMBLER__ in headers

 - Set memblock.current_limit when setting pfn limits

* tag 'nios2_update_for_v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux:
  nios2: ensure that memblock.current_limit is set when setting pfn limits
  nios2: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers
  nios2: Replace __ASSEMBLY__ with __ASSEMBLER__ in uapi headers

arch/nios2/include/asm/entry.h

@@ -10,7 +10,7 @@
 #ifndef _ASM_NIOS2_ENTRY_H
 #define _ASM_NIOS2_ENTRY_H
 
-#ifdef __ASSEMBLY__
+#ifdef __ASSEMBLER__
 
 #include <asm/processor.h>
 #include <asm/registers.h>
@@ -117,5 +117,5 @@
 	addi	sp, sp, SWITCH_STACK_SIZE
 .endm
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_NIOS2_ENTRY_H */

arch/nios2/include/asm/page.h

@@ -26,7 +26,7 @@
 #define PAGE_OFFSET	\
 	(CONFIG_NIOS2_MEM_BASE + CONFIG_NIOS2_KERNEL_REGION_BASE)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /*
  * This gives the physical RAM offset.
@@ -90,6 +90,6 @@ extern struct page *mem_map;
 
 #include <asm-generic/getorder.h>
 
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 #endif /* _ASM_NIOS2_PAGE_H */

arch/nios2/include/asm/processor.h

@@ -36,7 +36,7 @@
 /* Kuser helpers is mapped to this user space address */
 #define KUSER_BASE		0x1000
 #define KUSER_SIZE		(PAGE_SIZE)
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 # define TASK_SIZE		0x7FFF0000UL
 # define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 3))
@@ -72,6 +72,6 @@ extern unsigned long __get_wchan(struct task_struct *p);
 
 #define cpu_relax()	barrier()
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_NIOS2_PROCESSOR_H */

arch/nios2/include/asm/ptrace.h

@@ -18,7 +18,7 @@
 /* This struct defines the way the registers are stored on the
    stack during a system call.  */
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 struct pt_regs {
 	unsigned long  r8;	/* r8-r15 Caller-saved GP registers */
 	unsigned long  r9;
@@ -78,5 +78,5 @@ extern void show_regs(struct pt_regs *);
 
 int do_syscall_trace_enter(void);
 void do_syscall_trace_exit(void);
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _ASM_NIOS2_PTRACE_H */

arch/nios2/include/asm/registers.h

@@ -6,7 +6,7 @@
 #ifndef _ASM_NIOS2_REGISTERS_H
 #define _ASM_NIOS2_REGISTERS_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #include <asm/cpuinfo.h>
 #endif
 
@@ -44,7 +44,7 @@
 
 /* tlbmisc register bits */
 #define TLBMISC_PID_SHIFT	4
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #define TLBMISC_PID_MASK	((1UL << cpuinfo.tlb_pid_num_bits) - 1)
 #endif
 #define TLBMISC_WAY_MASK	0xf

arch/nios2/include/asm/setup.h

@@ -8,7 +8,7 @@
 
 #include <asm-generic/setup.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #ifdef __KERNEL__
 
 extern char exception_handler_hook[];
@@ -18,6 +18,6 @@ extern char fast_handler_end[];
 extern void pagetable_init(void);
 
 #endif/* __KERNEL__ */
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _ASM_NIOS2_SETUP_H */

arch/nios2/include/asm/thread_info.h

@@ -24,7 +24,7 @@
 #define THREAD_SIZE_ORDER	1
 #define THREAD_SIZE		8192 /* 2 * PAGE_SIZE */
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /*
  * low level task data that entry.S needs immediate access to
@@ -61,7 +61,7 @@ static inline struct thread_info *current_thread_info(void)
 
 	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
 }
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 /*
  * thread information flags

arch/nios2/include/asm/traps.h

@@ -12,7 +12,7 @@
 
 #define TRAP_ID_SYSCALL		0
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 void _exception(int signo, struct pt_regs *regs, int code, unsigned long addr);
 void do_page_fault(struct pt_regs *regs, unsigned long cause,
 		   unsigned long address);

arch/nios2/include/uapi/asm/ptrace.h

@@ -13,7 +13,7 @@
 #ifndef _UAPI_ASM_NIOS2_PTRACE_H
 #define _UAPI_ASM_NIOS2_PTRACE_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/types.h>
 
@@ -80,5 +80,5 @@ struct user_pt_regs {
 	__u32		regs[49];
 };
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _UAPI_ASM_NIOS2_PTRACE_H */

arch/nios2/kernel/setup.c

@@ -142,6 +142,20 @@ static void __init find_limits(unsigned long *min, unsigned long *max_low,
 	*max_high = PFN_DOWN(memblock_end_of_DRAM());
 }
 
+static void __init adjust_lowmem_bounds(void)
+{
+	phys_addr_t block_start, block_end;
+	u64 i;
+	phys_addr_t memblock_limit = 0;
+
+	for_each_mem_range(i, &block_start, &block_end) {
+		if (block_end > memblock_limit)
+			memblock_limit = block_end;
+	}
+
+	memblock_set_current_limit(memblock_limit);
+}
+
 void __init setup_arch(char **cmdline_p)
 {
 	console_verbose();
@@ -157,6 +171,7 @@ void __init setup_arch(char **cmdline_p)
 	/* Keep a copy of command line */
 	*cmdline_p = boot_command_line;
 
+	adjust_lowmem_bounds();
 	find_limits(&min_low_pfn, &max_low_pfn, &max_pfn);
 
 	memblock_reserve(__pa_symbol(_stext), _end - _stext);