[PATCH 2/2] Replace i386 open-coded cmdline parsing withearly_param/parse_early_param

From: Rusty Russell
Date: Wed Aug 02 2006 - 05:05:57 EST

This patch replaces the open-coded early commandline parsing
throughout the i386 boot code with the generic mechanism (already used
by ppc, powerpc, ia64 and s390). The code was inconsistent with
whether it deletes the option from the cmdline or not, meaning some of
these will get passed through the environment into init.

This transformation is mainly mechanical, but there are some notable
parts:

1) Grammar: s/linux never set's it up/linux never sets it up/

2) Remove hacked-in earlyprintk= option scanning. When someone
actually implements CONFIG_EARLY_PRINTK, then they can use
early_param().

3) Move declaration of generic_apic_probe() from setup.c into asm/apic.h

4) Various parameters now moved into their appropriate files (thanks Andi).

5) All parse functions which examine arg need to check for NULL,
except one where it has subtle humor value.

Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/kernel/acpi/boot.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/acpi/boot.c
--- linux-2.6.18-rc2-mm1/arch/i386/kernel/acpi/boot.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/acpi/boot.c 2006-08-02 18:07:43.000000000 +1000
@@ -1216,3 +1216,57 @@ int __init acpi_boot_init(void)

return 0;
}
+
+static int __init parse_acpi(char *arg)
+{
+ if (!arg)
+ return -EINVAL;
+
+ /* "acpi=off" disables both ACPI table parsing and interpreter */
+ if (strcmp(arg, "off") == 0) {
+ disable_acpi();
+ }
+ /* acpi=force to over-ride black-list */
+ else if (strcmp(arg, "force") == 0) {
+ acpi_force = 1;
+ acpi_ht = 1;
+ acpi_disabled = 0;
+ }
+ /* acpi=strict disables out-of-spec workarounds */
+ else if (strcmp(arg, "strict") == 0) {
+ acpi_strict = 1;
+ }
+ /* Limit ACPI just to boot-time to enable HT */
+ else if (strcmp(arg, "ht") == 0) {
+ if (!acpi_force)
+ disable_acpi();
+ acpi_ht = 1;
+ }
+ /* "acpi=noirq" disables ACPI interrupt routing */
+ else if (strcmp(arg, "noirq") == 0) {
+ acpi_noirq_set();
+ } else {
+ /* Core will printk when we return error. */
+ return -EINVAL;
+ }
+ return 0;
+}
+early_param("acpi", parse_acpi);
+
+/* FIXME: Using pci= for an ACPI parameter is a travesty. */
+static int __init parse_pci(char *arg)
+{
+ if (arg && strcmp(arg, "noacpi") == 0)
+ acpi_disable_pci();
+ return 0;
+}
+early_param("pci", parse_pci);
+
+#ifdef CONFIG_X86_IO_APIC
+static int __init parse_acpi_skip_timer_override(char *arg)
+{
+ acpi_skip_timer_override = 1;
+ return 0;
+}
+early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
+#endif /* CONFIG_X86_IO_APIC */
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/kernel/apic.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/apic.c
--- linux-2.6.18-rc2-mm1/arch/i386/kernel/apic.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/apic.c 2006-08-02 17:03:09.000000000 +1000
@@ -1372,3 +1372,18 @@ int __init APIC_init_uniprocessor (void)

return 0;
}
+
+static int __init parse_lapic(char *arg)
+{
+ lapic_enable();
+ return 0;
+}
+early_param("lapic", parse_lapic);
+
+static int __init parse_nolapic(char *arg)
+{
+ lapic_disable();
+ return 0;
+}
+early_param("nolapic", parse_nolapic);
+
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/kernel/io_apic.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/io_apic.c
--- linux-2.6.18-rc2-mm1/arch/i386/kernel/io_apic.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/io_apic.c 2006-08-02 16:56:28.000000000 +1000
@@ -69,7 +69,7 @@ int sis_apic_bug = -1;
*/
int nr_ioapic_registers[MAX_IO_APICS];

-int disable_timer_pin_1 __initdata;
+static int disable_timer_pin_1 __initdata;

/*
* Rough estimation of how many shared IRQs there are, can
@@ -2767,3 +2767,25 @@ int io_apic_set_pci_routing (int ioapic,
}

#endif /* CONFIG_ACPI */
+
+static int __init parse_disable_timer_pin_1(char *arg)
+{
+ disable_timer_pin_1 = 1;
+ return 0;
+}
+early_param("disable_timer_pin_1", parse_disable_timer_pin_1);
+
+static int __init parse_enable_timer_pin_1(char *arg)
+{
+ disable_timer_pin_1 = -1;
+ return 0;
+}
+early_param("enable_timer_pin_1", parse_enable_timer_pin_1);
+
+static int __init parse_noapic(char *arg)
+{
+ /* disable IO-APIC */
+ disable_ioapic_setup();
+ return 0;
+}
+early_param("noapic", parse_noapic);
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/kernel/machine_kexec.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/machine_kexec.c
--- linux-2.6.18-rc2-mm1/arch/i386/kernel/machine_kexec.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/machine_kexec.c 2006-08-02 13:45:43.000000000 +1000
@@ -9,6 +9,7 @@
#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/delay.h>
+#include <linux/init.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
@@ -209,3 +210,25 @@ NORET_TYPE void machine_kexec(struct kim
rnk = (relocate_new_kernel_t) reboot_code_buffer;
(*rnk)(page_list, reboot_code_buffer, image->start, cpu_has_pae);
}
+
+/* crashkernel=size@addr specifies the location to reserve for
+ * a crash kernel. By reserving this memory we guarantee
+ * that linux never sets it up as a DMA target.
+ * Useful for holding code to do something appropriate
+ * after a kernel panic.
+ */
+static int __init parse_crashkernel(char *arg)
+{
+ unsigned long size, base;
+ size = memparse(arg, &arg);
+ if (*arg == '@') {
+ base = memparse(arg+1, &arg);
+ /* FIXME: Do I want a sanity check
+ * to validate the memory range?
+ */
+ crashk_res.start = base;
+ crashk_res.end = base + size - 1;
+ }
+ return 0;
+}
+early_param("crashkernel", parse_crashkernel);
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/kernel/setup.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/setup.c
--- linux-2.6.18-rc2-mm1/arch/i386/kernel/setup.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/setup.c 2006-08-02 18:10:10.000000000 +1000
@@ -149,7 +149,6 @@ EXPORT_SYMBOL(ist_info);
struct e820map e820;

extern void early_cpu_init(void);
-extern void generic_apic_probe(char *);
extern int root_mountflags;

unsigned long saved_videomode;
@@ -715,238 +714,132 @@ static inline void copy_edd(void)
}
#endif

-static void __init parse_cmdline_early (char ** cmdline_p)
-{
- char c = ' ', *to = command_line, *from = saved_command_line;
- int len = 0;
- int userdef = 0;
+static int __initdata user_defined_memmap = 0;

- /* Save unparsed command line copy for /proc/cmdline */
- saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+/*
+ * "mem=nopentium" disables the 4MB page tables.
+ * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
+ * to <mem>, overriding the bios size.
+ * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
+ * <start> to <start>+<mem>, overriding the bios size.
+ *
+ * HPA tells me bootloaders need to parse mem=, so no new
+ * option should be mem= [also see Documentation/i386/boot.txt]
+ */
+static int __init parse_mem(char *arg)
+{
+ if (!arg)
+ return -EINVAL;

- for (;;) {
- if (c != ' ')
- goto next_char;
- /*
- * "mem=nopentium" disables the 4MB page tables.
- * "mem=XXX[kKmM]" defines a memory region from HIGH_MEM
- * to <mem>, overriding the bios size.
- * "memmap=XXX[KkmM]@XXX[KkmM]" defines a memory region from
- * <start> to <start>+<mem>, overriding the bios size.
- *
- * HPA tells me bootloaders need to parse mem=, so no new
- * option should be mem= [also see Documentation/i386/boot.txt]
+ if (strcmp(arg, "nopentium") == 0) {
+ clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
+ disable_pse = 1;
+ } else {
+ /* If the user specifies memory size, we
+ * limit the BIOS-provided memory map to
+ * that size. exactmap can be used to specify
+ * the exact map. mem=number can be used to
+ * trim the existing memory map.
*/
- if (!memcmp(from, "mem=", 4)) {
- if (to != command_line)
- to--;
- if (!memcmp(from+4, "nopentium", 9)) {
- from += 9+4;
- clear_bit(X86_FEATURE_PSE, boot_cpu_data.x86_capability);
- disable_pse = 1;
- } else {
- /* If the user specifies memory size, we
- * limit the BIOS-provided memory map to
- * that size. exactmap can be used to specify
- * the exact map. mem=number can be used to
- * trim the existing memory map.
- */
- unsigned long long mem_size;
-
- mem_size = memparse(from+4, &from);
- limit_regions(mem_size);
- userdef=1;
- }
- }
-
- else if (!memcmp(from, "memmap=", 7)) {
- if (to != command_line)
- to--;
- if (!memcmp(from+7, "exactmap", 8)) {
-#ifdef CONFIG_CRASH_DUMP
- /* If we are doing a crash dump, we
- * still need to know the real mem
- * size before original memory map is
- * reset.
- */
- find_max_pfn();
- saved_max_pfn = max_pfn;
-#endif
- from += 8+7;
- e820.nr_map = 0;
- userdef = 1;
- } else {
- /* If the user specifies memory size, we
- * limit the BIOS-provided memory map to
- * that size. exactmap can be used to specify
- * the exact map. mem=number can be used to
- * trim the existing memory map.
- */
- unsigned long long start_at, mem_size;
+ unsigned long long mem_size;

- mem_size = memparse(from+7, &from);
- if (*from == '@') {
- start_at = memparse(from+1, &from);
- add_memory_region(start_at, mem_size, E820_RAM);
- } else if (*from == '#') {
- start_at = memparse(from+1, &from);
- add_memory_region(start_at, mem_size, E820_ACPI);
- } else if (*from == '$') {
- start_at = memparse(from+1, &from);
- add_memory_region(start_at, mem_size, E820_RESERVED);
- } else {
- limit_regions(mem_size);
- userdef=1;
- }
- }
- }
-
- else if (!memcmp(from, "noexec=", 7))
- noexec_setup(from + 7);
+ mem_size = memparse(arg, &arg);
+ limit_regions(mem_size);
+ user_defined_memmap = 1;
+ }
+ return 0;
+}
+early_param("mem", parse_mem);

+static int __init parse_memmap(char *arg)
+{
+ if (!arg)
+ return -EINVAL;

-#ifdef CONFIG_X86_SMP
- /*
- * If the BIOS enumerates physical processors before logical,
- * maxcpus=N at enumeration-time can be used to disable HT.
+ if (strcmp(arg, "exactmap") == 0) {
+#ifdef CONFIG_CRASH_DUMP
+ /* If we are doing a crash dump, we
+ * still need to know the real mem
+ * size before original memory map is
+ * reset.
*/
- else if (!memcmp(from, "maxcpus=", 8)) {
- extern unsigned int maxcpus;
-
- maxcpus = simple_strtoul(from + 8, NULL, 0);
- }
+ find_max_pfn();
+ saved_max_pfn = max_pfn;
#endif
-
-#ifdef CONFIG_ACPI
- /* "acpi=off" disables both ACPI table parsing and interpreter */
- else if (!memcmp(from, "acpi=off", 8)) {
- disable_acpi();
- }
-
- /* acpi=force to over-ride black-list */
- else if (!memcmp(from, "acpi=force", 10)) {
- acpi_force = 1;
- acpi_ht = 1;
- acpi_disabled = 0;
- }
-
- /* acpi=strict disables out-of-spec workarounds */
- else if (!memcmp(from, "acpi=strict", 11)) {
- acpi_strict = 1;
- }
-
- /* Limit ACPI just to boot-time to enable HT */
- else if (!memcmp(from, "acpi=ht", 7)) {
- if (!acpi_force)
- disable_acpi();
- acpi_ht = 1;
- }
-
- /* "pci=noacpi" disable ACPI IRQ routing and PCI scan */
- else if (!memcmp(from, "pci=noacpi", 10)) {
- acpi_disable_pci();
- }
- /* "acpi=noirq" disables ACPI interrupt routing */
- else if (!memcmp(from, "acpi=noirq", 10)) {
- acpi_noirq_set();
+ e820.nr_map = 0;
+ user_defined_memmap = 1;
+ } else {
+ /* If the user specifies memory size, we
+ * limit the BIOS-provided memory map to
+ * that size. exactmap can be used to specify
+ * the exact map. mem=number can be used to
+ * trim the existing memory map.
+ */
+ unsigned long long start_at, mem_size;
+
+ mem_size = memparse(arg, &arg);
+ if (*arg == '@') {
+ start_at = memparse(arg+1, &arg);
+ add_memory_region(start_at, mem_size, E820_RAM);
+ } else if (*arg == '#') {
+ start_at = memparse(arg+1, &arg);
+ add_memory_region(start_at, mem_size, E820_ACPI);
+ } else if (*arg == '$') {
+ start_at = memparse(arg+1, &arg);
+ add_memory_region(start_at, mem_size, E820_RESERVED);
+ } else {
+ limit_regions(mem_size);
+ user_defined_memmap = 1;
}
+ }
+ return 0;
+}
+early_param("memmap", parse_memmap);

- else if (!memcmp(from, "acpi_sci=edge", 13))
- acpi_sci_flags.trigger = 1;
-
- else if (!memcmp(from, "acpi_sci=level", 14))
- acpi_sci_flags.trigger = 3;
-
- else if (!memcmp(from, "acpi_sci=high", 13))
- acpi_sci_flags.polarity = 1;
-
- else if (!memcmp(from, "acpi_sci=low", 12))
- acpi_sci_flags.polarity = 3;
-
-#ifdef CONFIG_X86_IO_APIC
- else if (!memcmp(from, "acpi_skip_timer_override", 24))
- acpi_skip_timer_override = 1;
-
- if (!memcmp(from, "disable_timer_pin_1", 19))
- disable_timer_pin_1 = 1;
- if (!memcmp(from, "enable_timer_pin_1", 18))
- disable_timer_pin_1 = -1;
-
- /* disable IO-APIC */
- else if (!memcmp(from, "noapic", 6))
- disable_ioapic_setup();
-#endif /* CONFIG_X86_IO_APIC */
-#endif /* CONFIG_ACPI */
+#ifdef CONFIG_PROC_VMCORE
+/* elfcorehdr= specifies the location of elf core header
+ * stored by the crashed kernel.
+ */
+static int __init parse_elfcorehdr(char *arg)
+{
+ if (!arg)
+ return -EINVAL;

-#ifdef CONFIG_X86_LOCAL_APIC
- /* enable local APIC */
- else if (!memcmp(from, "lapic", 5))
- lapic_enable();
+ elfcorehdr_addr = memparse(arg, &arg);
+ return 0;
+}
+early_param("elfcorehdr", parse_elfcorehdr);
+#endif /* CONFIG_PROC_VMCORE */

- /* disable local APIC */
- else if (!memcmp(from, "nolapic", 6))
- lapic_disable();
-#endif /* CONFIG_X86_LOCAL_APIC */
+/*
+ * highmem=size forces highmem to be exactly 'size' bytes.
+ * This works even on boxes that have no highmem otherwise.
+ * This also works to reduce highmem size on bigger boxes.
+ */
+static int __init parse_highmem(char *arg)
+{
+ if (!arg)
+ return -EINVAL;

-#ifdef CONFIG_KEXEC
- /* crashkernel=size@addr specifies the location to reserve for
- * a crash kernel. By reserving this memory we guarantee
- * that linux never set's it up as a DMA target.
- * Useful for holding code to do something appropriate
- * after a kernel panic.
- */
- else if (!memcmp(from, "crashkernel=", 12)) {
- unsigned long size, base;
- size = memparse(from+12, &from);
- if (*from == '@') {
- base = memparse(from+1, &from);
- /* FIXME: Do I want a sanity check
- * to validate the memory range?
- */
- crashk_res.start = base;
- crashk_res.end = base + size - 1;
- }
- }
-#endif
-#ifdef CONFIG_PROC_VMCORE
- /* elfcorehdr= specifies the location of elf core header
- * stored by the crashed kernel.
- */
- else if (!memcmp(from, "elfcorehdr=", 11))
- elfcorehdr_addr = memparse(from+11, &from);
-#endif
+ highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
+ return 0;
+}
+early_param("highmem", parse_highmem);

- /*
- * highmem=size forces highmem to be exactly 'size' bytes.
- * This works even on boxes that have no highmem otherwise.
- * This also works to reduce highmem size on bigger boxes.
- */
- else if (!memcmp(from, "highmem=", 8))
- highmem_pages = memparse(from+8, &from) >> PAGE_SHIFT;
-
- /*
- * vmalloc=size forces the vmalloc area to be exactly 'size'
- * bytes. This can be used to increase (or decrease) the
- * vmalloc area - the default is 128m.
- */
- else if (!memcmp(from, "vmalloc=", 8))
- __VMALLOC_RESERVE = memparse(from+8, &from);
+/*
+ * vmalloc=size forces the vmalloc area to be exactly 'size'
+ * bytes. This can be used to increase (or decrease) the
+ * vmalloc area - the default is 128m.
+ */
+static int __init parse_vmalloc(char *arg)
+{
+ if (!arg)
+ return -EINVAL;

- next_char:
- c = *(from++);
- if (!c)
- break;
- if (COMMAND_LINE_SIZE <= ++len)
- break;
- *(to++) = c;
- }
- *to = '\0';
- *cmdline_p = command_line;
- if (userdef) {
- printk(KERN_INFO "user-defined physical RAM map:\n");
- print_memory_map("user");
- }
+ __VMALLOC_RESERVE = memparse(arg, &arg);
+ return 0;
}
+early_param("vmalloc", parse_vmalloc);

/*
* Callback for efi_memory_walk.
@@ -1578,17 +1471,15 @@ void __init setup_arch(char **cmdline_p)
data_resource.start = virt_to_phys(_etext);
data_resource.end = virt_to_phys(_edata)-1;

- parse_cmdline_early(cmdline_p);
+ parse_early_param();

-#ifdef CONFIG_EARLY_PRINTK
- {
- char *s = strstr(*cmdline_p, "earlyprintk=");
- if (s) {
- setup_early_printk(strchr(s, '=') + 1);
- printk("early console enabled\n");
- }
+ if (user_defined_memmap) {
+ printk(KERN_INFO "user-defined physical RAM map:\n");
+ print_memory_map("user");
}
-#endif
+
+ strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = command_line;

max_low_pfn = setup_memory();

@@ -1617,7 +1508,7 @@ void __init setup_arch(char **cmdline_p)
dmi_scan_machine();

#ifdef CONFIG_X86_GENERICARCH
- generic_apic_probe(*cmdline_p);
+ generic_apic_probe();
#endif
if (efi_enabled)
efi_map_memmap();
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/kernel/smpboot.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/smpboot.c
--- linux-2.6.18-rc2-mm1/arch/i386/kernel/smpboot.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/kernel/smpboot.c 2006-08-02 17:03:45.000000000 +1000
@@ -1490,3 +1490,16 @@ void __init smp_intr_init(void)
/* IPI for generic function call */
set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
}
+
+/*
+ * If the BIOS enumerates physical processors before logical,
+ * maxcpus=N at enumeration-time can be used to disable HT.
+ */
+static int __init parse_maxcpus(char *arg)
+{
+ extern unsigned int maxcpus;
+
+ maxcpus = simple_strtoul(arg, NULL, 0);
+ return 0;
+}
+early_param("maxcpus", parse_maxcpus);
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/mach-generic/probe.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/mach-generic/probe.c
--- linux-2.6.18-rc2-mm1/arch/i386/mach-generic/probe.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/mach-generic/probe.c 2006-08-02 18:18:23.000000000 +1000
@@ -9,6 +9,7 @@
#include <linux/kernel.h>
#include <linux/ctype.h>
#include <linux/init.h>
+#include <linux/errno.h>
#include <asm/fixmap.h>
#include <asm/mpspec.h>
#include <asm/apicdef.h>
@@ -29,7 +30,24 @@ struct genapic *apic_probe[] __initdata
NULL,
};

-static int cmdline_apic;
+static int cmdline_apic __initdata;
+static int __init parse_apic(char *arg)
+{
+ int i;
+
+ if (!arg)
+ return -EINVAL;
+
+ for (i = 0; apic_probe[i]; i++) {
+ if (!strcmp(apic_probe[i]->name, arg)) {
+ genapic = apic_probe[i];
+ cmdline_apic = 1;
+ return 0;
+ }
+ }
+ return -ENOENT;
+}
+early_param("apic", parse_apic);

void __init generic_bigsmp_probe(void)
{
@@ -48,40 +66,20 @@ void __init generic_bigsmp_probe(void)
}
}

-void __init generic_apic_probe(char *command_line)
+void __init generic_apic_probe(void)
{
- char *s;
- int i;
- int changed = 0;
-
- s = strstr(command_line, "apic=");
- if (s && (s == command_line || isspace(s[-1]))) {
- char *p = strchr(s, ' '), old;
- if (!p)
- p = strchr(s, '\0');
- old = *p;
- *p = 0;
- for (i = 0; !changed && apic_probe[i]; i++) {
- if (!strcmp(apic_probe[i]->name, s+5)) {
- changed = 1;
+ if (!cmdline_apic) {
+ int i;
+ for (i = 0; apic_probe[i]; i++) {
+ if (apic_probe[i]->probe()) {
genapic = apic_probe[i];
+ break;
}
}
- if (!changed)
- printk(KERN_ERR "Unknown genapic `%s' specified.\n", s);
- *p = old;
- cmdline_apic = changed;
- }
- for (i = 0; !changed && apic_probe[i]; i++) {
- if (apic_probe[i]->probe()) {
- changed = 1;
- genapic = apic_probe[i];
- }
+ /* Not visible without early console */
+ if (!apic_probe[i])
+ panic("Didn't find an APIC driver");
}
- /* Not visible without early console */
- if (!changed)
- panic("Didn't find an APIC driver");
-
printk(KERN_INFO "Using APIC driver %s\n", genapic->name);
}

diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/arch/i386/mm/init.c working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/mm/init.c
--- linux-2.6.18-rc2-mm1/arch/i386/mm/init.c 2006-08-01 14:11:48.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/arch/i386/mm/init.c 2006-08-02 18:21:07.000000000 +1000
@@ -435,16 +435,22 @@ u64 __supported_pte_mask __read_mostly =
* on Enable
* off Disable
*/
-void __init noexec_setup(const char *str)
+static int __init noexec_setup(char *str)
{
- if (!strncmp(str, "on",2) && cpu_has_nx) {
- __supported_pte_mask |= _PAGE_NX;
- disable_nx = 0;
- } else if (!strncmp(str,"off",3)) {
+ if (!str || !strcmp(str, "on")) {
+ if (cpu_has_nx) {
+ __supported_pte_mask |= _PAGE_NX;
+ disable_nx = 0;
+ }
+ } else if (!strcmp(str,"off")) {
disable_nx = 1;
__supported_pte_mask &= ~_PAGE_NX;
- }
+ } else
+ return -EINVAL;
+
+ return 0;
}
+early_param("noexec", noexec_setup);

int nx_enabled = 0;
#ifdef CONFIG_X86_PAE
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/include/asm-i386/acpi.h working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/acpi.h
--- linux-2.6.18-rc2-mm1/include/asm-i386/acpi.h 2006-06-28 10:39:28.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/acpi.h 2006-08-02 17:26:42.000000000 +1000
@@ -131,21 +131,7 @@ static inline void disable_acpi(void)
extern int acpi_gsi_to_irq(u32 gsi, unsigned int *irq);

#ifdef CONFIG_X86_IO_APIC
-extern int skip_ioapic_setup;
extern int acpi_skip_timer_override;
-
-static inline void disable_ioapic_setup(void)
-{
- skip_ioapic_setup = 1;
-}
-
-static inline int ioapic_setup_disabled(void)
-{
- return skip_ioapic_setup;
-}
-
-#else
-static inline void disable_ioapic_setup(void) { }
#endif

static inline void acpi_noirq_set(void) { acpi_noirq = 1; }
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/include/asm-i386/apic.h working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/apic.h
--- linux-2.6.18-rc2-mm1/include/asm-i386/apic.h 2006-07-21 20:27:58.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/apic.h 2006-08-02 17:04:35.000000000 +1000
@@ -42,6 +42,8 @@ static inline void lapic_enable(void)
} while (0)


+extern void generic_apic_probe(void);
+
#ifdef CONFIG_X86_LOCAL_APIC

/*
@@ -117,8 +119,6 @@ extern void enable_APIC_timer(void);

extern void enable_NMI_through_LVT0 (void * dummy);

-extern int disable_timer_pin_1;
-
void smp_send_timer_broadcast_ipi(struct pt_regs *regs);
void switch_APIC_timer_to_ipi(void *cpumask);
void switch_ipi_to_APIC_timer(void *cpumask);
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/include/asm-i386/io_apic.h working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/io_apic.h
--- linux-2.6.18-rc2-mm1/include/asm-i386/io_apic.h 2006-08-01 14:12:09.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/io_apic.h 2006-08-02 17:08:20.000000000 +1000
@@ -148,6 +148,16 @@ static inline void io_apic_modify(unsign
/* 1 if "noapic" boot option passed */
extern int skip_ioapic_setup;

+static inline void disable_ioapic_setup(void)
+{
+ skip_ioapic_setup = 1;
+}
+
+static inline int ioapic_setup_disabled(void)
+{
+ return skip_ioapic_setup;
+}
+
/*
* If we use the IO-APIC for IRQ routing, disable automatic
* assignment of PCI IRQ's.
@@ -166,6 +176,7 @@ extern int (*ioapic_renumber_irq)(int io

#else /* !CONFIG_X86_IO_APIC */
#define io_apic_assign_pci_irqs 0
+static inline void disable_ioapic_setup(void) { }
#endif

#endif
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/include/asm-i386/pgtable.h working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/pgtable.h
--- linux-2.6.18-rc2-mm1/include/asm-i386/pgtable.h 2006-07-27 16:00:56.000000000 +1000
+++ working-2.6.18-rc2-mm1-i386-parse_early_param/include/asm-i386/pgtable.h 2006-08-02 11:02:33.000000000 +1000
@@ -391,8 +391,6 @@ extern pte_t *lookup_address(unsigned lo
static inline int set_kernel_exec(unsigned long vaddr, int enable) { return 0;}
#endif

-extern void noexec_setup(const char *str);
-
#if defined(CONFIG_HIGHPTE)
#define pte_offset_map(dir, address) \
((pte_t *)kmap_atomic(pmd_page(*(dir)),KM_PTE0) + pte_index(address))

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