mvebu: 5.15: fix compilation warning for mangle bootargs patch

Fix compilation warning for mangle bootargs patch.
Fix compilation warning:
arch/arm/boot/compressed/atags_to_fdt.c: In function 'append_rootblock':
arch/arm/boot/compressed/atags_to_fdt.c:84:13: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
   84 |         ptr = str - 1;
      |             ^
arch/arm/boot/compressed/atags_to_fdt.c: In function 'atags_to_fdt':
arch/arm/boot/compressed/atags_to_fdt.c:213:18: error: unused variable 'memsize' [-Werror=unused-variable]
  213 |         int ret, memsize;
      |                  ^~~~~~~
arch/arm/boot/compressed/atags_to_fdt.c:212:13: error: unused variable 'memcount' [-Werror=unused-variable]
  212 |         int memcount = 0;
      |             ^~~~~~~~
arch/arm/boot/compressed/atags_to_fdt.c:211:16: error: unused variable 'mem_reg_property' [-Werror=unused-variable]
  211 |         __be32 mem_reg_property[2 * 2 * NR_BANKS];
      |                ^~~~~~~~~~~~~~~~
arch/arm/boot/compressed/atags_to_fdt.c: At top level:
arch/arm/boot/compressed/atags_to_fdt.c:180:13: error: 'hex_str' defined but not used [-Werror=unused-function]
  180 | static void hex_str(char *out, uint32_t value)
      |             ^~~~~~~
arch/arm/boot/compressed/atags_to_fdt.c:63:17: error: 'get_cell_size' defined but not used [-Werror=unused-function]
   63 | static uint32_t get_cell_size(const void *fdt)
      |                 ^~~~~~~~~~~~~
arch/arm/boot/compressed/atags_to_fdt.c:43:12: error: 'setprop_cell' defined but not used [-Werror=unused-function]
   43 | static int setprop_cell(void *fdt, const char *node_path,
      |            ^~~~~~~~~~~~
arch/arm/boot/compressed/atags_to_fdt.c:25:12: error: 'setprop' defined but not used [-Werror=unused-function]
   25 | static int setprop(void *fdt, const char *node_path, const char *property,
      |            ^~~~~~~
cc1: all warnings being treated as errors

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

target/linux/mvebu/patches-5.15/300-mvebu-Mangle-bootloader-s-kernel-arguments.patch

@@ -57,16 +57,58 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
  #else
  #define do_extend_cmdline 0
  #endif
-@@ -69,6 +71,72 @@ static uint32_t get_cell_size(const void
+@@ -20,6 +22,7 @@ static int node_offset(void *fdt, const
+ 	return offset;
+ }
+ 
++#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ static int setprop(void *fdt, const char *node_path, const char *property,
+ 		   void *val_array, int size)
+ {
+@@ -28,6 +31,7 @@ static int setprop(void *fdt, const char
+ 		return offset;
+ 	return fdt_setprop(fdt, offset, property, val_array, size);
+ }
++#endif
+ 
+ static int setprop_string(void *fdt, const char *node_path,
+ 			  const char *property, const char *string)
+@@ -38,6 +42,7 @@ static int setprop_string(void *fdt, con
+ 	return fdt_setprop_string(fdt, offset, property, string);
+ }
+ 
++#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ static int setprop_cell(void *fdt, const char *node_path,
+ 			const char *property, uint32_t val)
+ {
+@@ -46,6 +51,7 @@ static int setprop_cell(void *fdt, const
+ 		return offset;
+ 	return fdt_setprop_cell(fdt, offset, property, val);
+ }
++#endif
+ 
+ static const void *getprop(const void *fdt, const char *node_path,
+ 			   const char *property, int *len)
+@@ -58,6 +64,7 @@ static const void *getprop(const void *f
+ 	return fdt_getprop(fdt, offset, property, len);
+ }
+ 
++#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ static uint32_t get_cell_size(const void *fdt)
+ {
+ 	int len;
+@@ -69,6 +76,74 @@ static uint32_t get_cell_size(const void
  	return cell_size;
  }
  
++#endif
++
 +#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE)
 +
 +static char *append_rootblock(char *dest, const char *str, int len, void *fdt)
 +{
-+	char *ptr, *end;
++	const char *ptr, *end;
-+	char *root="root=";
++	const char *root="root=";
 +	int i, l;
 +	const char *rootblock;
 +
@@ -130,7 +172,7 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
  static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)
  {
  	char cmdline[COMMAND_LINE_SIZE];
-@@ -88,12 +156,21 @@ static void merge_fdt_bootargs(void *fdt
+@@ -88,18 +163,28 @@ static void merge_fdt_bootargs(void *fdt
  
  	/* and append the ATAG_CMDLINE */
  	if (fdt_cmdline) {
@@ -152,7 +194,36 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
  	}
  	*ptr = '\0';
  
-@@ -168,7 +245,9 @@ int atags_to_fdt(void *atag_list, void *
+ 	setprop_string(fdt, "/chosen", "bootargs", cmdline);
+ }
+ 
++#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ static void hex_str(char *out, uint32_t value)
+ {
+ 	uint32_t digit;
+@@ -117,6 +202,7 @@ static void hex_str(char *out, uint32_t
+ 	}
+ 	*out = '\0';
+ }
++#endif
+ 
+ /*
+  * Convert and fold provided ATAGs into the provided FDT.
+@@ -131,9 +217,11 @@ int atags_to_fdt(void *atag_list, void *
+ 	struct tag *atag = atag_list;
+ 	/* In the case of 64 bits memory size, need to reserve 2 cells for
+ 	 * address and size for each bank */
++#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE
+ 	__be32 mem_reg_property[2 * 2 * NR_BANKS];
+-	int memcount = 0;
+-	int ret, memsize;
++	int memsize, memcount = 0;
++#endif
++	int ret;
+ 
+ 	/* make sure we've got an aligned pointer */
+ 	if ((u32)atag_list & 0x3)
+@@ -168,7 +256,9 @@ int atags_to_fdt(void *atag_list, void *
  			else
  				setprop_string(fdt, "/chosen", "bootargs",
  					       atag->u.cmdline.cmdline);
@@ -163,7 +234,7 @@ Signed-off-by: Michael Gray <michael.gray@lantisproject.com>
  			if (memcount >= sizeof(mem_reg_property)/4)
  				continue;
  			if (!atag->u.mem.size)
-@@ -212,6 +291,10 @@ int atags_to_fdt(void *atag_list, void *
+@@ -212,6 +302,10 @@ int atags_to_fdt(void *atag_list, void *
  		setprop(fdt, "/memory", "reg", mem_reg_property,
  			4 * memcount * memsize);
  	}