I'm sending this out as a RFC to get feedback and see which way folks would like to go. Patch 1 of this patch set makes COMMAND_LINE_SIZE a seperate config option for each architecture. However, an alternative to that would be to create a single default size(Possibly 2048 to satisfy patchs 2 and 3 of this patch set) for COMMAND_LINE_SIZE in ~kernel/Kconfig or ~init/Kconfig and then allow the different architecures to either bump this size up or down if needed.
This set of changes focus on COMMAND_LINE_SIZE. An inital patch was created to increase the size of COMMAND_LINE_SIZE for the powerpc architecture. However, after looking at the code, it appears powerpc does not actually use the define in the ppc headers but uses the common generic default. It seems like having COMMAND_LINE_SIZE a kernel config options is a cleaner way to modify the value, instead of going through and chaning defines. This applies to all architectures and not just powerpc.
The powerpc architecture uses asm-generic to set the value of COMMAND_LINE_SIZE, which should be changed to a kernel config option.
The size of COMMAND_LINE_SIZE for powerpc should be longer than 512 characters, as iscsi targets and cloud-init parameters are passed through the kernel command line.
Joseph Salisbury (3):
kconfig: Change COMMAND_LINE_SIZE to a kernel config option, which is
now set per architecture.
powerpc: Change the powerpc architecture to use Kconfig to set
COMMAND_LINE_SIZE.
powerpc: kconfig: Increase the size of COMMAND_LINE_SIZE to 2048 from
512 for powerpc.
arch/alpha/Kconfig | 6 ++++++
arch/alpha/include/uapi/asm/setup.h | 4 +++-
arch/arc/Kconfig | 6 ++++++
arch/arc/include/asm/setup.h | 4 +++-
arch/arm/Kconfig | 6 ++++++
arch/arm/include/uapi/asm/setup.h | 4 +++-
arch/arm64/Kconfig | 6 ++++++
arch/arm64/include/uapi/asm/setup.h | 4 +++-
arch/avr32/Kconfig | 6 ++++++
arch/avr32/include/uapi/asm/setup.h | 4 +++-
arch/c6x/Kconfig | 6 ++++++
arch/c6x/include/uapi/asm/setup.h | 4 +++-
arch/cris/Kconfig | 6 ++++++
arch/cris/include/uapi/asm/setup.h | 4 +++-
arch/frv/Kconfig | 6 ++++++
arch/frv/include/uapi/asm/setup.h | 5 +++--
arch/ia64/Kconfig | 6 ++++++
arch/ia64/include/uapi/asm/setup.h | 4 +++-
arch/m32r/Kconfig | 6 ++++++
arch/m32r/include/uapi/asm/setup.h | 5 +++--
arch/m68k/Kconfig | 6 ++++++
arch/m68k/include/uapi/asm/setup.h | 4 +++-
arch/microblaze/Kconfig | 6 ++++++
arch/microblaze/include/uapi/asm/setup.h | 4 +++-
arch/mips/Kconfig | 6 ++++++
arch/mips/include/uapi/asm/setup.h | 5 +++--
arch/mn10300/Kconfig | 6 ++++++
arch/mn10300/include/uapi/asm/param.h | 4 +++-
arch/parisc/Kconfig | 6 ++++++
arch/parisc/include/uapi/asm/setup.h | 4 +++-
arch/powerpc/Kconfig | 6 ++++++
arch/powerpc/boot/ops.h | 5 ++++-
arch/powerpc/include/asm/setup.h | 2 --
arch/powerpc/include/uapi/asm/setup.h | 1 -
arch/s390/Kconfig | 6 ++++++
arch/s390/include/uapi/asm/setup.h | 4 +++-
arch/score/Kconfig | 6 ++++++
arch/score/include/uapi/asm/setup.h | 5 ++++-
arch/sparc/Kconfig | 7 +++++++
arch/sparc/include/uapi/asm/setup.h | 7 ++-----
arch/tile/Kconfig | 6 ++++++
arch/tile/include/uapi/asm/setup.h | 5 +++--
arch/um/Kconfig.um | 6 ++++++
arch/um/include/asm/setup.h | 4 +++-
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/setup.h | 4 +++-
arch/xtensa/Kconfig | 6 ++++++
arch/xtensa/include/uapi/asm/setup.h | 4 +++-
include/uapi/asm-generic/setup.h | 2 +-
49 files changed, 210 insertions(+), 35 deletions(-)
delete mode 100644 arch/powerpc/include/uapi/asm/setup.h
--
1.9.1
BugLink: http://bugs.launchpad.net/bugs/1306677
While booting the PPC64EL kernel, the command line gets truncated to 512 characters. This is due to a limit of 512 defined for COMMAND_LINE_SIZE. It would be beneficial to have a command line longer than 512 characters, as iscsi targets and cloud-init parameters are passed through the kernel command line.
Signed-off-by: Joseph Salisbury <[email protected]>
---
arch/powerpc/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 3426bdc..becee70 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -614,7 +614,7 @@ config CMDLINE_BOOL
config COMMAND_LINE_SIZE
int "Maximum size of the command line."
- default "512"
+ default "2048"
help
This is the per architecture maximum command line size.
--
1.9.1
The powerpc architecture currently uses asm-generic to set the value of COMMAND_LINE_SIZE. This change will allow the value of COMMAND_LINE_SIZE to be set specifically for powerpc without affecting other architectures that may use asm-generic.
Signed-off-by: Joseph Salisbury <[email protected]>
---
arch/powerpc/include/asm/setup.h | 2 --
arch/powerpc/include/uapi/asm/setup.h | 1 -
2 files changed, 3 deletions(-)
delete mode 100644 arch/powerpc/include/uapi/asm/setup.h
diff --git a/arch/powerpc/include/asm/setup.h b/arch/powerpc/include/asm/setup.h
index 11ba86e..c7b62c3 100644
--- a/arch/powerpc/include/asm/setup.h
+++ b/arch/powerpc/include/asm/setup.h
@@ -1,8 +1,6 @@
#ifndef _ASM_POWERPC_SETUP_H
#define _ASM_POWERPC_SETUP_H
-#include <uapi/asm/setup.h>
-
#ifndef __ASSEMBLY__
extern void ppc_printk_progress(char *s, unsigned short hex);
diff --git a/arch/powerpc/include/uapi/asm/setup.h b/arch/powerpc/include/uapi/asm/setup.h
deleted file mode 100644
index 552df83..0000000
--- a/arch/powerpc/include/uapi/asm/setup.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/setup.h>
--
1.9.1
Having COMMAND_LINE_SIZE a kernel config option is a cleaner way to modify the value if needed. Currently defines need to be changed within the architecture specific header files.
The default COMMAND_LINE_SIZE for asm-generic is still set by a define in include/asm-generic/setup.h.
Signed-off-by: Joseph Salisbury <[email protected]>
---
arch/alpha/Kconfig | 6 ++++++
arch/alpha/include/uapi/asm/setup.h | 4 +++-
arch/arc/Kconfig | 6 ++++++
arch/arc/include/asm/setup.h | 4 +++-
arch/arm/Kconfig | 6 ++++++
arch/arm/include/uapi/asm/setup.h | 4 +++-
arch/arm64/Kconfig | 6 ++++++
arch/arm64/include/uapi/asm/setup.h | 4 +++-
arch/avr32/Kconfig | 6 ++++++
arch/avr32/include/uapi/asm/setup.h | 4 +++-
arch/c6x/Kconfig | 6 ++++++
arch/c6x/include/uapi/asm/setup.h | 4 +++-
arch/cris/Kconfig | 6 ++++++
arch/cris/include/uapi/asm/setup.h | 4 +++-
arch/frv/Kconfig | 6 ++++++
arch/frv/include/uapi/asm/setup.h | 5 +++--
arch/ia64/Kconfig | 6 ++++++
arch/ia64/include/uapi/asm/setup.h | 4 +++-
arch/m32r/Kconfig | 6 ++++++
arch/m32r/include/uapi/asm/setup.h | 5 +++--
arch/m68k/Kconfig | 6 ++++++
arch/m68k/include/uapi/asm/setup.h | 4 +++-
arch/microblaze/Kconfig | 6 ++++++
arch/microblaze/include/uapi/asm/setup.h | 4 +++-
arch/mips/Kconfig | 6 ++++++
arch/mips/include/uapi/asm/setup.h | 5 +++--
arch/mn10300/Kconfig | 6 ++++++
arch/mn10300/include/uapi/asm/param.h | 4 +++-
arch/parisc/Kconfig | 6 ++++++
arch/parisc/include/uapi/asm/setup.h | 4 +++-
arch/powerpc/Kconfig | 6 ++++++
arch/powerpc/boot/ops.h | 5 ++++-
arch/s390/Kconfig | 6 ++++++
arch/s390/include/uapi/asm/setup.h | 4 +++-
arch/score/Kconfig | 6 ++++++
arch/score/include/uapi/asm/setup.h | 5 ++++-
arch/sparc/Kconfig | 7 +++++++
arch/sparc/include/uapi/asm/setup.h | 7 ++-----
arch/tile/Kconfig | 6 ++++++
arch/tile/include/uapi/asm/setup.h | 5 +++--
arch/um/Kconfig.um | 6 ++++++
arch/um/include/asm/setup.h | 4 +++-
arch/x86/Kconfig | 6 ++++++
arch/x86/include/asm/setup.h | 4 +++-
arch/xtensa/Kconfig | 6 ++++++
arch/xtensa/include/uapi/asm/setup.h | 4 +++-
include/uapi/asm-generic/setup.h | 2 +-
47 files changed, 210 insertions(+), 32 deletions(-)
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index b7ff9a3..42bd2e7 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -563,6 +563,12 @@ config HAVE_DEC_LOCK
depends on SMP
default y
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line"
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
diff --git a/arch/alpha/include/uapi/asm/setup.h b/arch/alpha/include/uapi/asm/setup.h
index b50014b..f2956cc 100644
--- a/arch/alpha/include/uapi/asm/setup.h
+++ b/arch/alpha/include/uapi/asm/setup.h
@@ -1,7 +1,9 @@
#ifndef __ALPHA_SETUP_H
#define __ALPHA_SETUP_H
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
/*
* We leave one page for the initial stack page, and one page for
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 9596b0a..b9e5351 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -141,6 +141,12 @@ config ARC_HAS_REENTRANT_IRQ_LV2
endif
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-4096)"
range 2 4096
diff --git a/arch/arc/include/asm/setup.h b/arch/arc/include/asm/setup.h
index e10f8ce..9708f1a 100644
--- a/arch/arc/include/asm/setup.h
+++ b/arch/arc/include/asm/setup.h
@@ -12,7 +12,9 @@
#include <linux/types.h>
#include <uapi/asm/setup.h>
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
/*
* Data structure to map a ID to string
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ab438cb..d5fadfa 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1615,6 +1615,12 @@ config PAGE_OFFSET
default 0x80000000 if VMSPLIT_2G
default 0xC0000000
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "1024"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
diff --git a/arch/arm/include/uapi/asm/setup.h b/arch/arm/include/uapi/asm/setup.h
index 979ff40..9cded84 100644
--- a/arch/arm/include/uapi/asm/setup.h
+++ b/arch/arm/include/uapi/asm/setup.h
@@ -16,7 +16,9 @@
#include <linux/types.h>
-#define COMMAND_LINE_SIZE 1024
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
/* The list ends with an ATAG_NONE node. */
#define ATAG_NONE 0x00000000
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index e6e4d37..528845f 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -186,6 +186,12 @@ config SCHED_SMT
MultiThreading at a cost of slightly increased overhead in some
places. If unsure say N here.
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "2048"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
diff --git a/arch/arm64/include/uapi/asm/setup.h b/arch/arm64/include/uapi/asm/setup.h
index 9cf2e46..f5ade83 100644
--- a/arch/arm64/include/uapi/asm/setup.h
+++ b/arch/arm64/include/uapi/asm/setup.h
@@ -21,6 +21,8 @@
#include <linux/types.h>
-#define COMMAND_LINE_SIZE 2048
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index b6878eb..e1ebdd6 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -233,6 +233,12 @@ config NMI_DEBUGGING
source "kernel/Kconfig.hz"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Default kernel command line"
default ""
diff --git a/arch/avr32/include/uapi/asm/setup.h b/arch/avr32/include/uapi/asm/setup.h
index a654df7..b78cc6d 100644
--- a/arch/avr32/include/uapi/asm/setup.h
+++ b/arch/avr32/include/uapi/asm/setup.h
@@ -11,6 +11,8 @@
#ifndef _UAPI__ASM_AVR32_SETUP_H__
#define _UAPI__ASM_AVR32_SETUP_H__
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _UAPI__ASM_AVR32_SETUP_H__ */
diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
index 77ea09b..9a91e99 100644
--- a/arch/c6x/Kconfig
+++ b/arch/c6x/Kconfig
@@ -57,6 +57,12 @@ source "kernel/Kconfig.freezer"
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "1024"
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Kernel command line"
depends on CMDLINE_BOOL
diff --git a/arch/c6x/include/uapi/asm/setup.h b/arch/c6x/include/uapi/asm/setup.h
index ad9ac97..73e46d3 100644
--- a/arch/c6x/include/uapi/asm/setup.h
+++ b/arch/c6x/include/uapi/asm/setup.h
@@ -1,6 +1,8 @@
#ifndef _UAPI_ASM_C6X_SETUP_H
#define _UAPI_ASM_C6X_SETUP_H
-#define COMMAND_LINE_SIZE 1024
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _UAPI_ASM_C6X_SETUP_H */
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 52731e2..d4dd8bc 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -65,6 +65,12 @@ menu "General setup"
source "fs/Kconfig.binfmt"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
config ETRAX_CMDLINE
string "Kernel command line"
default "root=/dev/mtdblock3"
diff --git a/arch/cris/include/uapi/asm/setup.h b/arch/cris/include/uapi/asm/setup.h
index b907286..fbad81d 100644
--- a/arch/cris/include/uapi/asm/setup.h
+++ b/arch/cris/include/uapi/asm/setup.h
@@ -1,6 +1,8 @@
#ifndef _CRIS_SETUP_H
#define _CRIS_SETUP_H
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 34aa193..6f5b071 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -54,6 +54,12 @@ config HZ
int
default 1000
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "512"
+ help
+ This is the per architecture maximum command line size.
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
diff --git a/arch/frv/include/uapi/asm/setup.h b/arch/frv/include/uapi/asm/setup.h
index fbf3fc9..c4ed2bf 100644
--- a/arch/frv/include/uapi/asm/setup.h
+++ b/arch/frv/include/uapi/asm/setup.h
@@ -12,7 +12,8 @@
#ifndef _UAPI_ASM_SETUP_H
#define _UAPI_ASM_SETUP_H
-#define COMMAND_LINE_SIZE 512
-
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _UAPI_ASM_SETUP_H */
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 12c3afe..92c1754 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -352,6 +352,12 @@ config SMP
If you don't know what to do here, say N.
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "2048"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-4096)"
range 2 4096
diff --git a/arch/ia64/include/uapi/asm/setup.h b/arch/ia64/include/uapi/asm/setup.h
index 8d56458..ecfeea7 100644
--- a/arch/ia64/include/uapi/asm/setup.h
+++ b/arch/ia64/include/uapi/asm/setup.h
@@ -1,7 +1,9 @@
#ifndef __IA64_SETUP_H
#define __IA64_SETUP_H
-#define COMMAND_LINE_SIZE 2048
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
extern struct ia64_boot_param {
__u64 command_line; /* physical address of command line arguments */
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index 9e44bbd..72c265c 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -300,6 +300,12 @@ config CHIP_M32700_TS1
depends on (CHIP_M32700 && SMP)
default n
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "512"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
diff --git a/arch/m32r/include/uapi/asm/setup.h b/arch/m32r/include/uapi/asm/setup.h
index 96961a4..a45fbef 100644
--- a/arch/m32r/include/uapi/asm/setup.h
+++ b/arch/m32r/include/uapi/asm/setup.h
@@ -5,7 +5,8 @@
* This is set up by the setup-routine at boot-time
*/
-#define COMMAND_LINE_SIZE 512
-
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _UAPI_ASM_M32R_SETUP_H */
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 87b7c75..9f68b97 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -124,6 +124,12 @@ endmenu
menu "Kernel Features"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
if COLDFIRE
source "kernel/Kconfig.preempt"
endif
diff --git a/arch/m68k/include/uapi/asm/setup.h b/arch/m68k/include/uapi/asm/setup.h
index 6a6dc63..a96470e 100644
--- a/arch/m68k/include/uapi/asm/setup.h
+++ b/arch/m68k/include/uapi/asm/setup.h
@@ -11,6 +11,8 @@
#ifndef _UAPI_M68K_SETUP_H
#define _UAPI_M68K_SETUP_H
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _UAPI_M68K_SETUP_H */
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 9ae0854..fa409d6 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -91,6 +91,12 @@ comment "Boot options"
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Default kernel command string"
depends on CMDLINE_BOOL
diff --git a/arch/microblaze/include/uapi/asm/setup.h b/arch/microblaze/include/uapi/asm/setup.h
index 76bc2ac..5992d0b 100644
--- a/arch/microblaze/include/uapi/asm/setup.h
+++ b/arch/microblaze/include/uapi/asm/setup.h
@@ -11,7 +11,9 @@
#ifndef _UAPI_ASM_MICROBLAZE_SETUP_H
#define _UAPI_ASM_MICROBLAZE_SETUP_H
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
# ifndef __ASSEMBLY__
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 5cd695f..1200836 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2247,6 +2247,12 @@ config HW_PERF_EVENTS
source "mm/Kconfig"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "4096"
+ help
+ This is the per architecture maximum command line size.
+
config SMP
bool "Multi-Processing support"
depends on SYS_SUPPORTS_SMP
diff --git a/arch/mips/include/uapi/asm/setup.h b/arch/mips/include/uapi/asm/setup.h
index 93f237b..323902a 100644
--- a/arch/mips/include/uapi/asm/setup.h
+++ b/arch/mips/include/uapi/asm/setup.h
@@ -1,7 +1,8 @@
#ifndef _UAPI_MIPS_SETUP_H
#define _UAPI_MIPS_SETUP_H
-#define COMMAND_LINE_SIZE 4096
-
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _UAPI_MIPS_SETUP_H */
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index a648de1..4a940bc 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -199,6 +199,12 @@ config SMP
If you don't know what to do here, say N.
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int
depends on SMP
diff --git a/arch/mn10300/include/uapi/asm/param.h b/arch/mn10300/include/uapi/asm/param.h
index 02a0ca6..b632f88 100644
--- a/arch/mn10300/include/uapi/asm/param.h
+++ b/arch/mn10300/include/uapi/asm/param.h
@@ -13,6 +13,8 @@
#include <asm-generic/param.h>
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _ASM_PARAM_H */
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 1faefed..633ab34 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -295,6 +295,12 @@ config HPUX
bool "Support for HP-UX binaries"
depends on !64BIT
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "1024"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
diff --git a/arch/parisc/include/uapi/asm/setup.h b/arch/parisc/include/uapi/asm/setup.h
index 7da2e5b..c70453f 100644
--- a/arch/parisc/include/uapi/asm/setup.h
+++ b/arch/parisc/include/uapi/asm/setup.h
@@ -1,6 +1,8 @@
#ifndef _PARISC_SETUP_H
#define _PARISC_SETUP_H
-#define COMMAND_LINE_SIZE 1024
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _PARISC_SETUP_H */
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e099899..3426bdc 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -612,6 +612,12 @@ config PPC_DENORMALISATION
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "512"
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Initial kernel command string"
depends on CMDLINE_BOOL
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index b3218ce..8a91edb 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -15,7 +15,10 @@
#include "types.h"
#include "string.h"
-#define COMMAND_LINE_SIZE 512
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
+
#define MAX_PATH_LEN 256
#define MAX_PROP_LEN 256 /* What should this be? */
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index d68fe34..01cfcbb 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -348,6 +348,12 @@ config SMP
Even if you don't know what to do here, say Y.
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "4096"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-256)"
range 2 256
diff --git a/arch/s390/include/uapi/asm/setup.h b/arch/s390/include/uapi/asm/setup.h
index 5a637e3..23e51e1 100644
--- a/arch/s390/include/uapi/asm/setup.h
+++ b/arch/s390/include/uapi/asm/setup.h
@@ -6,7 +6,9 @@
#ifndef _UAPI_ASM_S390_SETUP_H
#define _UAPI_ASM_S390_SETUP_H
-#define COMMAND_LINE_SIZE 4096
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#define ARCH_COMMAND_LINE_SIZE 896
diff --git a/arch/score/Kconfig b/arch/score/Kconfig
index 4ac8cae..63de4bd 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig
@@ -58,6 +58,12 @@ config 32BIT
config ARCH_FLATMEM_ENABLE
def_bool y
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
source "mm/Kconfig"
config MEMORY_START
diff --git a/arch/score/include/uapi/asm/setup.h b/arch/score/include/uapi/asm/setup.h
index ab9dbdb..aa59951 100644
--- a/arch/score/include/uapi/asm/setup.h
+++ b/arch/score/include/uapi/asm/setup.h
@@ -1,7 +1,10 @@
#ifndef _UAPI_ASM_SCORE_SETUP_H
#define _UAPI_ASM_SCORE_SETUP_H
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
+
#define MEMORY_START 0
#define MEMORY_SIZE 0x2000000
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 29f2e98..148114d 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -329,6 +329,13 @@ config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
depends on SPARC64
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256" if SPARC32
+ default "2048" if SPARC64
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Initial kernel command string"
depends on CMDLINE_BOOL
diff --git a/arch/sparc/include/uapi/asm/setup.h b/arch/sparc/include/uapi/asm/setup.h
index 5337684..bcf105b 100644
--- a/arch/sparc/include/uapi/asm/setup.h
+++ b/arch/sparc/include/uapi/asm/setup.h
@@ -5,11 +5,8 @@
#ifndef _UAPI_SPARC_SETUP_H
#define _UAPI_SPARC_SETUP_H
-#if defined(__sparc__) && defined(__arch64__)
-# define COMMAND_LINE_SIZE 2048
-#else
-# define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
#endif
-
#endif /* _UAPI_SPARC_SETUP_H */
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 85258ca..6aa6d6a 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -336,6 +336,12 @@ config CMDLINE_BOOL
Systems with fully functional boot loaders (e.g. mboot, or
if booting over PCI) should leave this option set to 'N'.
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "2048"
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Built-in kernel command string"
depends on CMDLINE_BOOL
diff --git a/arch/tile/include/uapi/asm/setup.h b/arch/tile/include/uapi/asm/setup.h
index e6f7da2..7e1e7dd 100644
--- a/arch/tile/include/uapi/asm/setup.h
+++ b/arch/tile/include/uapi/asm/setup.h
@@ -15,7 +15,8 @@
#ifndef _UAPI_ASM_TILE_SETUP_H
#define _UAPI_ASM_TILE_SETUP_H
-#define COMMAND_LINE_SIZE 2048
-
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* _UAPI_ASM_TILE_SETUP_H */
diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um
index a7520c9..c0af3f9 100644
--- a/arch/um/Kconfig.um
+++ b/arch/um/Kconfig.um
@@ -119,6 +119,12 @@ config SMP
If you don't know what to do, say N.
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "4096"
+ help
+ This is the per architecture maximum command line size.
+
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
diff --git a/arch/um/include/asm/setup.h b/arch/um/include/asm/setup.h
index 99f0863..ec3c951 100644
--- a/arch/um/include/asm/setup.h
+++ b/arch/um/include/asm/setup.h
@@ -5,6 +5,8 @@
* command line, so this choice is ok.
*/
-#define COMMAND_LINE_SIZE 4096
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#endif /* SETUP_H_INCLUDED */
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 25d2c6f..67a70ae 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1826,6 +1826,12 @@ config CMDLINE_BOOL
Systems with fully functional boot loaders (i.e. non-embedded)
should leave this option set to 'N'.
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "2048"
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Built-in kernel command string"
depends on CMDLINE_BOOL
diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index 9264f04..0ab46ee 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -3,7 +3,9 @@
#include <uapi/asm/setup.h>
-#define COMMAND_LINE_SIZE 2048
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
#include <linux/linkage.h>
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 02d6d29..00874f8 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -266,6 +266,12 @@ config GENERIC_CALIBRATE_DELAY
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
+config COMMAND_LINE_SIZE
+ int "Maximum size of the command line."
+ default "256"
+ help
+ This is the per architecture maximum command line size.
+
config CMDLINE
string "Initial kernel command string"
depends on CMDLINE_BOOL
diff --git a/arch/xtensa/include/uapi/asm/setup.h b/arch/xtensa/include/uapi/asm/setup.h
index 9fa8ad9..c320d8e 100644
--- a/arch/xtensa/include/uapi/asm/setup.h
+++ b/arch/xtensa/include/uapi/asm/setup.h
@@ -11,7 +11,9 @@
#ifndef _XTENSA_SETUP_H
#define _XTENSA_SETUP_H
-#define COMMAND_LINE_SIZE 256
+#ifdef CONFIG_COMMAND_LINE_SIZE
+#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
+#endif
extern void set_except_vector(int n, void *addr);
diff --git a/include/uapi/asm-generic/setup.h b/include/uapi/asm-generic/setup.h
index 6fc26a5..0ec13fc 100644
--- a/include/uapi/asm-generic/setup.h
+++ b/include/uapi/asm-generic/setup.h
@@ -1,6 +1,6 @@
#ifndef __ASM_GENERIC_SETUP_H
#define __ASM_GENERIC_SETUP_H
-#define COMMAND_LINE_SIZE 512
+#define COMMAND_LINE_SIZE 512
#endif /* __ASM_GENERIC_SETUP_H */
--
1.9.1