diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-04-06 01:41:22 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-04-06 01:41:22 +0200 |
commit | 9efe21cb82b5dbe3b0b2ae4de4eccc64ecb94e95 (patch) | |
tree | 7ff8833745d2f268f897f6fa4a27263b4a572245 /kernel/params.c | |
parent | de18836e447c2dc30120c0919b8db8ddc0401cc4 (diff) | |
parent | 0221c81b1b8eb0cbb6b30a0ced52ead32d2b4e4c (diff) |
Merge branch 'linus' into irq/threaded
Conflicts:
include/linux/irq.h
kernel/irq/handle.c
Diffstat (limited to 'kernel/params.c')
-rw-r--r-- | kernel/params.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/kernel/params.c b/kernel/params.c index a1e3025b19a..de273ec85bd 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -24,6 +24,9 @@ #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 @@ -217,7 +220,19 @@ int param_set_charp(const char *val, struct kernel_param *kp) return -ENOSPC; } - *(char **)kp->arg = (char *)val; + if (kp->perm & 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; + *(char **)kp->arg = kstrdup(val, GFP_KERNEL); + if (!kp->arg) + return -ENOMEM; + } else + *(const char **)kp->arg = val; + return 0; } @@ -571,6 +586,15 @@ void module_param_sysfs_remove(struct module *mod) } #endif +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) + kfree(*(char **)params[i].arg); +} + static void __init kernel_add_sysfs_param(const char *name, struct kernel_param *kparam, unsigned int name_skip) |