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Message-ID: <20200203115132.04e5ed05@canb.auug.org.au>
Date: Mon, 3 Feb 2020 11:51:32 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Linux Next Mailing List <linux-next@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Arvind Sankar <nivedita@...m.mit.edu>
Subject: Re: linux-next: manual merge of the akpm-current tree with the
ftrace tree
Hi all,
On Wed, 15 Jan 2020 16:47:08 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> Today's linux-next merge of the akpm-current tree got a conflict in:
>
> init/main.c
>
> between commit:
>
> 0068c92a9270 ("init/main.c: Alloc initcall_command_line in do_initcall() and free it")
>
> from the ftrace tree and commit:
>
> 21cc5aef9811 ("init/main.c: remove unnecessary repair_env_string in do_initcall_level")
>
> from the akpm-current tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> --
> Cheers,
> Stephen Rothwell
>
> diff --cc init/main.c
> index 031723614b80,7dc422c6444a..000000000000
> --- a/init/main.c
> +++ b/init/main.c
> @@@ -249,143 -245,8 +249,142 @@@ static int __init loglevel(char *str
>
> early_param("loglevel", loglevel);
>
> +#ifdef CONFIG_BOOT_CONFIG
> +
> +char xbc_namebuf[XBC_KEYLEN_MAX] __initdata;
> +
> +#define rest(dst, end) ((end) > (dst) ? (end) - (dst) : 0)
> +
> +static int __init xbc_snprint_cmdline(char *buf, size_t size,
> + struct xbc_node *root)
> +{
> + struct xbc_node *knode, *vnode;
> + char *end = buf + size;
> + char c = '\"';
> + const char *val;
> + int ret;
> +
> + xbc_node_for_each_key_value(root, knode, val) {
> + ret = xbc_node_compose_key_after(root, knode,
> + xbc_namebuf, XBC_KEYLEN_MAX);
> + if (ret < 0)
> + return ret;
> +
> + vnode = xbc_node_get_child(knode);
> + ret = snprintf(buf, rest(buf, end), "%s%c", xbc_namebuf,
> + vnode ? '=' : ' ');
> + if (ret < 0)
> + return ret;
> + buf += ret;
> + if (!vnode)
> + continue;
> +
> + c = '\"';
> + xbc_array_for_each_value(vnode, val) {
> + ret = snprintf(buf, rest(buf, end), "%c%s", c, val);
> + if (ret < 0)
> + return ret;
> + buf += ret;
> + c = ',';
> + }
> + if (rest(buf, end) > 2)
> + strcpy(buf, "\" ");
> + buf += 2;
> + }
> +
> + return buf - (end - size);
> +}
> +#undef rest
> +
> +/* Make an extra command line under given key word */
> +static char * __init xbc_make_cmdline(const char *key)
> +{
> + struct xbc_node *root;
> + char *new_cmdline;
> + int ret, len = 0;
> +
> + root = xbc_find_node(key);
> + if (!root)
> + return NULL;
> +
> + /* Count required buffer size */
> + len = xbc_snprint_cmdline(NULL, 0, root);
> + if (len <= 0)
> + return NULL;
> +
> + new_cmdline = memblock_alloc(len + 1, SMP_CACHE_BYTES);
> + if (!new_cmdline) {
> + pr_err("Failed to allocate memory for extra kernel cmdline.\n");
> + return NULL;
> + }
> +
> + ret = xbc_snprint_cmdline(new_cmdline, len + 1, root);
> + if (ret < 0 || ret > len) {
> + pr_err("Failed to print extra kernel cmdline.\n");
> + return NULL;
> + }
> +
> + return new_cmdline;
> +}
> +
> +u32 boot_config_checksum(unsigned char *p, u32 size)
> +{
> + u32 ret = 0;
> +
> + while (size--)
> + ret += *p++;
> +
> + return ret;
> +}
> +
> +static void __init setup_boot_config(void)
> +{
> + u32 size, csum;
> + char *data, *copy;
> + u32 *hdr;
> +
> + if (!initrd_end)
> + return;
> +
> + hdr = (u32 *)(initrd_end - 8);
> + size = hdr[0];
> + csum = hdr[1];
> +
> + if (size >= XBC_DATA_MAX)
> + return;
> +
> + data = ((void *)hdr) - size;
> + if ((unsigned long)data < initrd_start)
> + return;
> +
> + if (boot_config_checksum((unsigned char *)data, size) != csum)
> + return;
> +
> + copy = memblock_alloc(size + 1, SMP_CACHE_BYTES);
> + if (!copy) {
> + pr_err("Failed to allocate memory for boot config\n");
> + return;
> + }
> +
> + memcpy(copy, data, size);
> + copy[size] = '\0';
> +
> + if (xbc_init(copy) < 0)
> + pr_err("Failed to parse boot config\n");
> + else {
> + pr_info("Load boot config: %d bytes\n", size);
> + /* keys starting with "kernel." are passed via cmdline */
> + extra_command_line = xbc_make_cmdline("kernel");
> + /* Also, "init." keys are init arguments */
> + extra_init_args = xbc_make_cmdline("init");
> + }
> +}
> +#else
> +#define setup_boot_config() do { } while (0)
> +#endif
> +
> /* Change NUL term back to "=", to make "param" the whole string. */
> - static int __init repair_env_string(char *param, char *val,
> - const char *unused, void *arg)
> + static void __init repair_env_string(char *param, char *val)
> {
> if (val) {
> /* param=val or param="val"? */
> @@@ -1162,15 -990,22 +1161,21 @@@ static const char *initcall_level_names
> "late",
> };
>
> + static int __init ignore_unknown_bootoption(char *param, char *val,
> + const char *unused, void *arg)
> + {
> + return 0;
> + }
> +
> -static void __init do_initcall_level(int level)
> +static void __init do_initcall_level(int level, char *command_line)
> {
> initcall_entry_t *fn;
>
> - strcpy(initcall_command_line, saved_command_line);
> parse_args(initcall_level_names[level],
> - initcall_command_line, __start___param,
> + command_line, __start___param,
> __stop___param - __start___param,
> level, level,
> - NULL, &repair_env_string);
> + NULL, ignore_unknown_bootoption);
>
> trace_initcall_level(initcall_level_names[level]);
> for (fn = initcall_levels[level]; fn < initcall_levels[level+1]; fn++)
This is now a conflict between the ftrace tree and Linus' tree.
--
Cheers,
Stephen Rothwell
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