r568 - in trunk/openbios-devel: drivers modules

Author: blueswirl
Date: 2009-08-23 14:40:22 +0200 (Sun, 23 Aug 2009)
New Revision: 568

Modified:
   trunk/openbios-devel/drivers/fw_cfg.c
   trunk/openbios-devel/modules/pc-parts.c
Log:
Fix gcc 4.4 warnings about strict aliasing

Rather than cast char arrays to other types, use correct types and cast
them to char pointers when needed.

Author: Pavel Roskin 
Signed-off-by: Blue Swirl

Modified: trunk/openbios-devel/drivers/fw_cfg.c
===================================================================
--- trunk/openbios-devel/drivers/fw_cfg.c	2009-08-23 12:40:20 UTC (rev 567)
+++ trunk/openbios-devel/drivers/fw_cfg.c	2009-08-23 12:40:22 UTC (rev 568)
@@ -34,31 +34,31 @@
 uint64_t
 fw_cfg_read_i64(uint16_t cmd)
 {
-    char buf[sizeof(uint64_t)];
+    uint64_t buf;

-    fw_cfg_read(cmd, buf, sizeof(uint64_t));
+    fw_cfg_read(cmd, (char *)&buf, sizeof(uint64_t));

-    return __le64_to_cpu(*(uint64_t *)buf);
+    return __le64_to_cpu(buf);
 }

uint32_t
 fw_cfg_read_i32(uint16_t cmd)
 {
-    char buf[sizeof(uint32_t)];
+    uint32_t buf;

-    fw_cfg_read(cmd, buf, sizeof(uint32_t));
+    fw_cfg_read(cmd, (char *)&buf, sizeof(uint32_t));

-    return __le32_to_cpu(*(uint32_t *)buf);
+    return __le32_to_cpu(buf);
 }

uint16_t
 fw_cfg_read_i16(uint16_t cmd)
 {
-    char buf[sizeof(uint16_t)];
+    uint16_t buf;

-    fw_cfg_read(cmd, buf, sizeof(uint16_t));
+    fw_cfg_read(cmd, (char *)&buf, sizeof(uint16_t));

-    return __le16_to_cpu(*(uint16_t *)buf);
+    return __le16_to_cpu(buf);
 }

void

Modified: trunk/openbios-devel/modules/pc-parts.c
===================================================================
--- trunk/openbios-devel/modules/pc-parts.c	2009-08-23 12:40:20 UTC (rev 567)
+++ trunk/openbios-devel/modules/pc-parts.c	2009-08-23 12:40:22 UTC (rev 568)
@@ -58,8 +58,8 @@
    	unsigned char e_head;
    	unsigned char e_sector;
    	unsigned char e_cyl;
-		unsigned char start_sect[4]; /* unaligned little endian */
-		unsigned char nr_sects[4]; /* ditto */
+		u32 start_sect; /* unaligned little endian */
+		u32 nr_sects; /* ditto */
    } *p;
    unsigned char buf[512];

@@ -96,11 +96,11 @@
    		printk("partition %d does not exist\n", parnum+1 );
    		RET( 0 );
    	}
-		di->offs = (llong)(__le32_to_cpu(*((u32 *)p->start_sect))) * bs;
-		di->size = (llong)(__le32_to_cpu(*((u32 *)p->nr_sects))) * bs;
+		di->offs = (llong)(__le32_to_cpu(p->start_sect)) * bs;
+		di->size = (llong)(__le32_to_cpu(p->nr_sects)) * bs;

/* printk("Primary partition at sector %x\n",
-				__le32_to_cpu(*((u32 *)p->start_sect))); */
+				__le32_to_cpu(p->start_sect)); */

RET( -1 );
    } else {
@@ -123,7 +123,7 @@
    	printk("Extended partition at %d\n", i+1);

/* Visit each logical partition labels */
-		ext_start = __le32_to_cpu(*((u32 *)p[i].start_sect));
+		ext_start = __le32_to_cpu(p[i].start_sect);
    	cur_table = ext_start;
    	cur_part = 4;

@@ -147,8 +147,8 @@
    				RET( 0 );
    			}
    			di->offs =
-					(llong)(cur_table+__le32_to_cpu(*((u32 *)p->start_sect))) * bs;
-				di->size = (llong)__le32_to_cpu(*((u32 *)p->nr_sects)) * bs;
+					(llong)(cur_table+__le32_to_cpu(p->start_sect)) * bs;
+				di->size = (llong)__le32_to_cpu(p->nr_sects) * bs;
    			RET ( -1 );
    		}

@@ -157,7 +157,7 @@
    			printk("no link\n");
    			break;
    		}
-			cur_table = ext_start + __le32_to_cpu(*((u32 *)p[1].start_sect));
+			cur_table = ext_start + __le32_to_cpu(p[1].start_sect);

cur_part++;
    	}