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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-02-07 23:28:17 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-02-10 17:19:39 -0500 |
| commit | a91e4f12ffc42fa019b5a66eaa8702f5e0f08a6a (patch) | |
| tree | 0ba9972be60c1f4fed5780a6e676e592848e0f27 /lib/bootconfig.c | |
| parent | f61872bb58a1cd8f0422aab1940eeee8be579d38 (diff) | |
| download | lwn-a91e4f12ffc42fa019b5a66eaa8702f5e0f08a6a.tar.gz lwn-a91e4f12ffc42fa019b5a66eaa8702f5e0f08a6a.zip | |
bootconfig: Allocate xbc_nodes array dynamically
To reduce the large static array from kernel data, allocate
xbc_nodes array dynamically only if the kernel loads a
bootconfig.
Note that this also add dummy memblock.h for user-spacae
bootconfig tool.
Link: http://lkml.kernel.org/r/158108569699.3187.6512834527603883707.stgit@devnote2
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'lib/bootconfig.c')
| -rw-r--r-- | lib/bootconfig.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/lib/bootconfig.c b/lib/bootconfig.c index afb2e767e6fe..3ea601a2eba5 100644 --- a/lib/bootconfig.c +++ b/lib/bootconfig.c @@ -6,12 +6,13 @@ #define pr_fmt(fmt) "bootconfig: " fmt +#include <linux/bootconfig.h> #include <linux/bug.h> #include <linux/ctype.h> #include <linux/errno.h> #include <linux/kernel.h> +#include <linux/memblock.h> #include <linux/printk.h> -#include <linux/bootconfig.h> #include <linux/string.h> /* @@ -23,7 +24,7 @@ * node (for array). */ -static struct xbc_node xbc_nodes[XBC_NODE_MAX] __initdata; +static struct xbc_node *xbc_nodes __initdata; static int xbc_node_num __initdata; static char *xbc_data __initdata; static size_t xbc_data_size __initdata; @@ -719,7 +720,8 @@ void __init xbc_destroy_all(void) xbc_data = NULL; xbc_data_size = 0; xbc_node_num = 0; - memset(xbc_nodes, 0, sizeof(xbc_nodes)); + memblock_free(__pa(xbc_nodes), sizeof(struct xbc_node) * XBC_NODE_MAX); + xbc_nodes = NULL; } /** @@ -748,6 +750,13 @@ int __init xbc_init(char *buf) return -ERANGE; } + xbc_nodes = memblock_alloc(sizeof(struct xbc_node) * XBC_NODE_MAX, + SMP_CACHE_BYTES); + if (!xbc_nodes) { + pr_err("Failed to allocate memory for bootconfig nodes.\n"); + return -ENOMEM; + } + memset(xbc_nodes, 0, sizeof(struct xbc_node) * XBC_NODE_MAX); xbc_data = buf; xbc_data_size = ret + 1; last_parent = NULL; |