From: David S. Miller <davem@sunset.davemloft.net>
Date: Thu, 29 Sep 2005 04:46:43 +0000 (-0700)
Subject: [SPARC64]: Kill all external references to sp_banks[]
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=10147570f9eaff3920f0c67bad7244c2eb958d4f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[SPARC64]: Kill all external references to sp_banks[]

Thus, we can mark sp_banks[] static in arch/sparc64/mm/init.c

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index 1aa15990f5af..eeb1e835c423 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -757,26 +757,12 @@ void __init cheetah_ecache_flush_init(void)
 	ecache_flush_size = (2 * largest_size);
 	ecache_flush_linesize = smallest_linesize;
 
-	/* Discover a physically contiguous chunk of physical
-	 * memory in 'sp_banks' of size ecache_flush_size calculated
-	 * above.  Store the physical base of this area at
-	 * ecache_flush_physbase.
-	 */
-	for (node = 0; ; node++) {
-		if (sp_banks[node].num_bytes == 0)
-			break;
-		if (sp_banks[node].num_bytes >= ecache_flush_size) {
-			ecache_flush_physbase = sp_banks[node].base_addr;
-			break;
-		}
-	}
+	ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
 
-	/* Note: Zero would be a valid value of ecache_flush_physbase so
-	 * don't use that as the success test. :-)
-	 */
-	if (sp_banks[node].num_bytes == 0) {
+	if (ecache_flush_physbase == ~0UL) {
 		prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
-			    "contiguous physical memory.\n", ecache_flush_size);
+			    "contiguous physical memory.\n",
+			    ecache_flush_size);
 		prom_halt();
 	}
 
@@ -1345,16 +1331,9 @@ static int cheetah_fix_ce(unsigned long physaddr)
 /* Return non-zero if PADDR is a valid physical memory address. */
 static int cheetah_check_main_memory(unsigned long paddr)
 {
-	int i;
+	unsigned long vaddr = PAGE_OFFSET + paddr;
 
-	for (i = 0; ; i++) {
-		if (sp_banks[i].num_bytes == 0)
-			break;
-		if (paddr >= sp_banks[i].base_addr &&
-		    paddr < (sp_banks[i].base_addr + sp_banks[i].num_bytes))
-			return 1;
-	}
-	return 0;
+	return kern_addr_valid(vaddr);
 }
 
 void cheetah_cee_handler(struct pt_regs *regs, unsigned long afsr, unsigned long afar)
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index 80793d61f311..31fbc67719a1 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -32,8 +32,6 @@
 
 #define ELEMENTS(arr) (sizeof (arr)/sizeof (arr[0]))
 
-extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
-
 /*
  * To debug kernel to catch accesses to certain virtual/physical addresses.
  * Mode = 0 selects physical watchpoints, mode = 1 selects virtual watchpoints.
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 63a7b9bafaff..48851a2e4fe1 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -41,7 +41,14 @@
 
 extern void device_scan(void);
 
-struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
+struct sparc_phys_banks {
+	unsigned long base_addr;
+	unsigned long num_bytes;
+};
+
+#define SPARC_PHYS_BANKS 32
+
+static struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
 
 unsigned long *sparc64_valid_addr_bitmap __read_mostly;
 
@@ -1425,6 +1432,20 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
 }
 #endif
 
+unsigned long __init find_ecache_flush_span(unsigned long size)
+{
+	unsigned long i;
+
+	for (i = 0; ; i++) {
+		if (sp_banks[i].num_bytes == 0)
+			break;
+		if (sp_banks[i].num_bytes >= size)
+			return sp_banks[i].base_addr;
+	}
+
+	return ~0UL;
+}
+
 static void __init prom_probe_memory(void)
 {
 	struct linux_mlist_p1275 *mlist;
diff --git a/include/asm-sparc64/page.h b/include/asm-sparc64/page.h
index 7f8d764abc47..5426bb28a993 100644
--- a/include/asm-sparc64/page.h
+++ b/include/asm-sparc64/page.h
@@ -140,23 +140,6 @@ extern unsigned long page_to_pfn(struct page *);
 #define virt_to_phys __pa
 #define phys_to_virt __va
 
-/* The following structure is used to hold the physical
- * memory configuration of the machine.  This is filled in
- * probe_memory() and is later used by mem_init() to set up
- * mem_map[].  We statically allocate SPARC_PHYS_BANKS of
- * these structs, this is arbitrary.  The entry after the
- * last valid one has num_bytes==0.
- */
-
-struct sparc_phys_banks {
-	unsigned long base_addr;
-	unsigned long num_bytes;
-};
-
-#define SPARC_PHYS_BANKS 32
-
-extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
-
 #endif /* !(__ASSEMBLY__) */
 
 #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h
index 82273c801b07..8c6dfc6c7af6 100644
--- a/include/asm-sparc64/pgtable.h
+++ b/include/asm-sparc64/pgtable.h
@@ -342,6 +342,7 @@ extern pgd_t swapper_pg_dir[2048];
 extern pmd_t swapper_low_pmd_dir[2048];
 
 extern void paging_init(void);
+extern unsigned long find_ecache_flush_span(unsigned long size);
 
 /* These do nothing with the way I have things setup. */
 #define mmu_lockarea(vaddr, len)		(vaddr)