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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-06-12 21:46:56 -0600 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2009-06-12 21:46:56 +0930 |
| commit | 45fcc70c0b6ee0c508e1fdb5fef735c3546803f4 (patch) | |
| tree | 15ea34cf77ecd9bbd4f78259ced012f18a26e01b | |
| parent | 9a71af2c3627b379b7c31917a7f6ee0d29bc559b (diff) | |
| download | op-kernel-dev-45fcc70c0b6ee0c508e1fdb5fef735c3546803f4.zip op-kernel-dev-45fcc70c0b6ee0c508e1fdb5fef735c3546803f4.tar.gz | |
module_param: split perm field into flags and perm
Impact: cleanup
Rather than hack KPARAM_KMALLOCED into the perm field, separate it out.
Since the perm field was 32 bits and only needs 16, we don't add bloat.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| -rw-r--r-- | include/linux/moduleparam.h | 8 | ||||
| -rw-r--r-- | kernel/params.c | 9 |
2 files changed, 9 insertions, 8 deletions
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h index 9bbca8e..009a5f7 100644 --- a/include/linux/moduleparam.h +++ b/include/linux/moduleparam.h @@ -36,9 +36,13 @@ typedef int (*param_set_fn)(const char *val, struct kernel_param *kp); /* Returns length written or -errno. Buffer is 4k (ie. be short!) */ typedef int (*param_get_fn)(char *buffer, struct kernel_param *kp); +/* Flag bits for kernel_param.flags */ +#define KPARAM_KMALLOCED 1 + struct kernel_param { const char *name; - unsigned int perm; + u16 perm; + u16 flags; param_set_fn set; param_get_fn get; union { @@ -88,7 +92,7 @@ struct kparam_array static struct kernel_param __moduleparam_const __param_##name \ __used \ __attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \ - = { __param_str_##name, perm, set, get, { arg } } + = { __param_str_##name, perm, 0, set, get, { arg } } #define module_param_call(name, set, get, arg, perm) \ __module_param_call(MODULE_PARAM_PREFIX, name, set, get, arg, perm) diff --git a/kernel/params.c b/kernel/params.c index 023abbf..b4660dc 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -24,9 +24,6 @@ #include <linux/err.h> #include <linux/slab.h> -/* We abuse the high bits of "perm" to record whether we kmalloc'ed. */ -#define KPARAM_KMALLOCED 0x80000000 - #if 0 #define DEBUGP printk #else @@ -220,13 +217,13 @@ int param_set_charp(const char *val, struct kernel_param *kp) return -ENOSPC; } - if (kp->perm & KPARAM_KMALLOCED) + if (kp->flags & KPARAM_KMALLOCED) kfree(*(char **)kp->arg); /* This is a hack. We can't need to strdup in early boot, and we * don't need to; this mangled commandline is preserved. */ if (slab_is_available()) { - kp->perm |= KPARAM_KMALLOCED; + kp->flags |= KPARAM_KMALLOCED; *(char **)kp->arg = kstrdup(val, GFP_KERNEL); if (!kp->arg) return -ENOMEM; @@ -591,7 +588,7 @@ void destroy_params(const struct kernel_param *params, unsigned num) unsigned int i; for (i = 0; i < num; i++) - if (params[i].perm & KPARAM_KMALLOCED) + if (params[i].flags & KPARAM_KMALLOCED) kfree(*(char **)params[i].arg); } |
