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fix: replace 'SUBDIRS' by 'M' options in make #2

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fix: replace 'SUBDIRS' by 'M' options in make #2

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f16e604
fix: replace 'SUBDIRS' by 'M' options in make because 'SUBDIRS' was r…
Vilerio Mar 18, 2026
823c62f
fix: removing junk use with debugfs_create_u32
Vilerio Mar 18, 2026
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2 changes: 1 addition & 1 deletion example1/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -8,4 +8,4 @@ WARN_FLAGS += -Wall

.PHONY: default
defualt:
$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
$(MAKE) -C $(KDIR) M=$(PWD) modules
8 changes: 1 addition & 7 deletions example1/debugfs_example1.c
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,6 @@ static u32 hello = 0;
// This is called when the module loads.
int init_module(void)
{
struct dentry *junk;

// Create directory `/sys/kernel/debug/example1`.
//
Expand Down Expand Up @@ -53,12 +52,7 @@ int init_module(void)
//
// See also linux-source/fs/debugfs/file.c:debugfs_create_u32
//
junk = debugfs_create_u32("hello", 0666, dir, &hello);
if (!junk) {
// Abort module load.
printk(KERN_ALERT "debugfs_example1: failed to create /sys/kernel/debug/example1/hello\n");
return -1;
}
debugfs_create_u32("hello", 0666, dir, &hello);

return 0;
}
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2 changes: 1 addition & 1 deletion example2/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -8,4 +8,4 @@ WARN_FLAGS += -Wall

.PHONY: default
defualt:
$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
$(MAKE) -C $(KDIR) M=$(PWD) modules
7 changes: 1 addition & 6 deletions example2/debugfs_example2.c
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Original file line number Diff line number Diff line change
Expand Up @@ -139,12 +139,7 @@ int init_module(void)
//
// See also linux-source/fs/debugfs/file.c:debugfs_create_u32
//
junk = debugfs_create_u32("sum", 0444, dir, &sum);
if (!junk) {
// Abort module load.
printk(KERN_ALERT "debugfs_example2: failed to create /sys/kernel/debug/example2/add\n");
return -1;
}
debugfs_create_u32("sum", 0444, dir, &sum);

return 0;
}
Expand Down