Jan 30 2008

arch/x86/ia32: use time_before, time_before_eq, etc. 

Author: Julia Lawall <julia@diku.dk>

The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.

A simplified version of the semantic patch making this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// 
@ change_compare_np @
expression E;
@@

(
- jiffies <= E
+ time_before_eq(jiffies,E)
|
- jiffies >= E
+ time_after_eq(jiffies,E)
|
- jiffies < E
+ time_before(jiffies,E)
|
- jiffies > E
+ time_after(jiffies,E)
)

@ include depends on change_compare_np @
@@

#include 

@ no_include depends on !include && change_compare_np @
@@

  #include 
+ #include 
// 

[ mingo@elte.hu: merge to x86.git ]

Signed-off-by: Julia Lawall 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner 

---
 arch/x86/ia32/ia32_aout.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
 
diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index f1a0f83..e4c1207 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -25,6 +25,7 @@
 #include <linux/binfmts.h>
 #include <linux/personality.h>
 #include <linux/init.h>
+#include <linux/jiffies.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -359,13 +360,14 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 #ifdef WARN_OLD
 		static unsigned long error_time, error_time2;
 		if ((ex.a_text & 0xfff || ex.a_data & 0xfff) &&
-		    (N_MAGIC(ex) != NMAGIC) && (jiffies-error_time2) > 5*HZ) {
+		    (N_MAGIC(ex) != NMAGIC) &&
+				time_after(jiffies, error_time2 + 5*HZ)) {
 			printk(KERN_NOTICE "executable not page aligned\n");
 			error_time2 = jiffies;
 		}
 
 		if ((fd_offset & ~PAGE_MASK) != 0 &&
-		    (jiffies - error_time) > 5*HZ) {
+			    time_after(jiffies, error_time + 5*HZ)) {
 			printk(KERN_WARNING
 			       "fd_offset is not page aligned. Please convert "
 			       "program: %s\n",
@@ -484,7 +486,7 @@ static int load_aout_library(struct file *file)
 
 #ifdef WARN_OLD
 		static unsigned long error_time;
-		if ((jiffies-error_time) > 5*HZ) {
+		if (time_after(jiffies, error_time + 5*HZ)) {
 			printk(KERN_WARNING
 			       "N_TXTOFF is not page aligned. Please convert "
 			       "library: %s\n",

qlambert