From: Greg Ungerer <gerg@snapgear.com>
Date: Thu, 19 Jul 2007 08:49:15 +0000 (-0700)
Subject: m68knommu: remove is_in_rom() function
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=10146801e8b960d7473e350b60458d9d5a2be1cf;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

m68knommu: remove is_in_rom() function

Remove is_in_rom() function.  It doesn't actually serve the purpose it was
intended to.  If you look at the use of it _access_ok() (which is the only use
of it) then it is obvious that most of memory is marked as access_ok.  No
point having is_in_rom() then, so remove it.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/arch/m68knommu/kernel/m68k_ksyms.c b/arch/m68knommu/kernel/m68k_ksyms.c
index 25327c9eadd7..f795062aba1e 100644
--- a/arch/m68knommu/kernel/m68k_ksyms.c
+++ b/arch/m68knommu/kernel/m68k_ksyms.c
@@ -81,8 +81,6 @@ EXPORT_SYMBOL(__mulsi3);
 EXPORT_SYMBOL(__udivsi3);
 EXPORT_SYMBOL(__umodsi3);
 
-EXPORT_SYMBOL(is_in_rom);
-
 #ifdef CONFIG_COLDFIRE
 extern unsigned int *dma_device_address;
 extern unsigned long dma_base_addr, _ramend;
diff --git a/arch/m68knommu/mm/memory.c b/arch/m68knommu/mm/memory.c
index 1a66b71035a4..f93b88b51f9f 100644
--- a/arch/m68knommu/mm/memory.c
+++ b/arch/m68knommu/mm/memory.c
@@ -33,23 +33,3 @@ unsigned long kernel_map(unsigned long paddr, unsigned long size,
 	return paddr;
 }
 
-
-int is_in_rom(unsigned long addr)
-{
-	extern unsigned long _ramstart, _ramend;
-
-	/*
-	 *	What we are really trying to do is determine if addr is
-	 *	in an allocated kernel memory region. If not then assume
-	 *	we cannot free it or otherwise de-allocate it. Ideally
-	 *	we could restrict this to really being in a ROM or flash,
-	 *	but that would need to be done on a board by board basis,
-	 *	not globally.
-	 */
-	if ((addr < _ramstart) || (addr >= _ramend))
-		return(1);
-
-	/* Default case, not in ROM */
-	return(0);
-}
-
diff --git a/include/asm-m68knommu/pgtable.h b/include/asm-m68knommu/pgtable.h
index 9dfbbc24aa71..e1e6a1d2333a 100644
--- a/include/asm-m68knommu/pgtable.h
+++ b/include/asm-m68knommu/pgtable.h
@@ -49,7 +49,6 @@ static inline int pte_file(pte_t pte) { return 0; }
  * These would be in other places but having them here reduces the diffs.
  */
 extern unsigned int kobjsize(const void *objp);
-extern int is_in_rom(unsigned long);
 
 /*
  * No page table caches to initialise.
diff --git a/include/asm-m68knommu/uaccess.h b/include/asm-m68knommu/uaccess.h
index 62b29b10bc6d..9ed9169a8849 100644
--- a/include/asm-m68knommu/uaccess.h
+++ b/include/asm-m68knommu/uaccess.h
@@ -15,12 +15,15 @@
 
 #define access_ok(type,addr,size)	_access_ok((unsigned long)(addr),(size))
 
+/*
+ * It is not enough to just have access_ok check for a real RAM address.
+ * This would disallow the case of code/ro-data running XIP in flash/rom.
+ * Ideally we would check the possible flash ranges too, but that is
+ * currently not so easy.
+ */
 static inline int _access_ok(unsigned long addr, unsigned long size)
 {
-	extern unsigned long memory_start, memory_end;
-
-	return (((addr >= memory_start) && (addr+size < memory_end)) ||
-		(is_in_rom(addr) && is_in_rom(addr+size)));
+	return 1;
 }
 
 /*