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authorDmitri Vorobiev <dmitri.vorobiev@movial.com>2009-11-21 22:34:41 +0200
committerRalf Baechle <ralf@linux-mips.org>2009-12-17 01:57:35 +0000
commit6acc7d485c24c00e111c61b2e6dff9180faebcae (patch)
tree7c7519153775b20a87ff1a4745d16b0f1369861a /arch/mips
parentde4148f3ef54b644a181ad75a6fb4b373f2b01f0 (diff)
downloadvexpress-lsk-6acc7d485c24c00e111c61b2e6dff9180faebcae.tar.gz
MIPS: Fix and enhance built-in kernel command line
Currently, MIPS kernels silently overwrite kernel command-line parameters hardcoded in CONFIG_CMDLINE by the ones received from firmware. Therefore, using firmware remains the only reliable method to transfer the command-line parameters, which is not always desirable or convenient, and the CONFIG_CMDLINE option is thereby effectively rendered useless. This patch fixes the problem described above and introduces a more flexible scheme of handling the kernel command line, in a manner identical to what is currently used for x86. The default behavior, i.e. when CONFIG_CMDLINE_BOOL is not defined, retains the existing semantics, and firmware command-line arguments override the hardcoded ones. [Ralf: I fixed up all the defconfig files so the stay unaffected by this change.] Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.com> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/689/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/Kconfig.debug45
-rw-r--r--arch/mips/configs/ar7_defconfig2
-rw-r--r--arch/mips/configs/bcm47xx_defconfig2
-rw-r--r--arch/mips/configs/bcm63xx_defconfig2
-rw-r--r--arch/mips/configs/bigsur_defconfig2
-rw-r--r--arch/mips/configs/capcella_defconfig2
-rw-r--r--arch/mips/configs/cavium-octeon_defconfig2
-rw-r--r--arch/mips/configs/cobalt_defconfig2
-rw-r--r--arch/mips/configs/db1000_defconfig2
-rw-r--r--arch/mips/configs/db1100_defconfig2
-rw-r--r--arch/mips/configs/db1200_defconfig2
-rw-r--r--arch/mips/configs/db1500_defconfig2
-rw-r--r--arch/mips/configs/db1550_defconfig2
-rw-r--r--arch/mips/configs/decstation_defconfig2
-rw-r--r--arch/mips/configs/e55_defconfig2
-rw-r--r--arch/mips/configs/fuloong2e_defconfig2
-rw-r--r--arch/mips/configs/ip22_defconfig2
-rw-r--r--arch/mips/configs/ip27_defconfig2
-rw-r--r--arch/mips/configs/ip28_defconfig2
-rw-r--r--arch/mips/configs/ip32_defconfig2
-rw-r--r--arch/mips/configs/jazz_defconfig2
-rw-r--r--arch/mips/configs/jmr3927_defconfig2
-rw-r--r--arch/mips/configs/lasat_defconfig2
-rw-r--r--arch/mips/configs/lemote2f_defconfig2
-rw-r--r--arch/mips/configs/malta_defconfig2
-rw-r--r--arch/mips/configs/markeins_defconfig2
-rw-r--r--arch/mips/configs/mipssim_defconfig2
-rw-r--r--arch/mips/configs/mpc30x_defconfig2
-rw-r--r--arch/mips/configs/msp71xx_defconfig2
-rw-r--r--arch/mips/configs/mtx1_defconfig2
-rw-r--r--arch/mips/configs/pb1100_defconfig2
-rw-r--r--arch/mips/configs/pb1500_defconfig2
-rw-r--r--arch/mips/configs/pb1550_defconfig2
-rw-r--r--arch/mips/configs/pnx8335-stb225_defconfig2
-rw-r--r--arch/mips/configs/pnx8550-jbs_defconfig2
-rw-r--r--arch/mips/configs/pnx8550-stb810_defconfig2
-rw-r--r--arch/mips/configs/powertv_defconfig2
-rw-r--r--arch/mips/configs/rb532_defconfig2
-rw-r--r--arch/mips/configs/rbtx49xx_defconfig2
-rw-r--r--arch/mips/configs/rm200_defconfig2
-rw-r--r--arch/mips/configs/sb1250-swarm_defconfig2
-rw-r--r--arch/mips/configs/tb0219_defconfig2
-rw-r--r--arch/mips/configs/tb0226_defconfig2
-rw-r--r--arch/mips/configs/tb0287_defconfig2
-rw-r--r--arch/mips/configs/workpad_defconfig2
-rw-r--r--arch/mips/configs/wrppmc_defconfig2
-rw-r--r--arch/mips/configs/yosemite_defconfig2
-rw-r--r--arch/mips/kernel/setup.c24
48 files changed, 123 insertions, 38 deletions
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index 23817bc7a26..d2b88a0be51 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -20,15 +20,52 @@ config EARLY_PRINTK
doesn't cooperate with an X server. You should normally say N here,
unless you want to debug such a crash.
+config CMDLINE_BOOL
+ bool "Built-in kernel command line"
+ default n
+ help
+ For most systems, it is firmware or second stage bootloader that
+ by default specifies the kernel command line options. However,
+ it might be necessary or advantageous to either override the
+ default kernel command line or add a few extra options to it.
+ For such cases, this option allows you to hardcode your own
+ command line options directly into the kernel. For that, you
+ should choose 'Y' here, and fill in the extra boot arguments
+ in CONFIG_CMDLINE.
+
+ The built-in options will be concatenated to the default command
+ line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
+ command line will be ignored and replaced by the built-in string.
+
+ Most MIPS systems will normally expect 'N' here and rely upon
+ the command line from the firmware or the second-stage bootloader.
+
config CMDLINE
string "Default kernel command string"
+ depends on CMDLINE_BOOL
default ""
help
On some platforms, there is currently no way for the boot loader to
- pass arguments to the kernel. For these platforms, you can supply
- some command-line options at build time by entering them here. In
- other cases you can specify kernel args so that you don't have
- to set them up in board prom initialization routines.
+ pass arguments to the kernel. For these platforms, and for the cases
+ when you want to add some extra options to the command line or ignore
+ the default command line, you can supply some command-line options at
+ build time by entering them here. In other cases you can specify
+ kernel args so that you don't have to set them up in board prom
+ initialization routines.
+
+ For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
+ options.
+
+config CMDLINE_OVERRIDE
+ bool "Built-in command line overrides firware arguments"
+ default n
+ depends on CMDLINE_BOOL
+ help
+ By setting this option to 'Y' you will have your kernel ignore
+ command line arguments from firmware or second stage bootloader.
+ Instead, the built-in command line will be used exclusively.
+
+ Normally, you will choose 'N' here.
config DEBUG_STACK_USAGE
bool "Enable stack utilization instrumentation"
diff --git a/arch/mips/configs/ar7_defconfig b/arch/mips/configs/ar7_defconfig
index 1d5ec3c11c7..5a5b6ba7514 100644
--- a/arch/mips/configs/ar7_defconfig
+++ b/arch/mips/configs/ar7_defconfig
@@ -1051,7 +1051,9 @@ CONFIG_TRACING_SUPPORT=y
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="rootfstype=squashfs,jffs2"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/bcm47xx_defconfig b/arch/mips/configs/bcm47xx_defconfig
index 8715de1d809..267bd46120b 100644
--- a/arch/mips/configs/bcm47xx_defconfig
+++ b/arch/mips/configs/bcm47xx_defconfig
@@ -1852,7 +1852,7 @@ CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/bcm63xx_defconfig b/arch/mips/configs/bcm63xx_defconfig
index efa65982239..7fee0273c82 100644
--- a/arch/mips/configs/bcm63xx_defconfig
+++ b/arch/mips/configs/bcm63xx_defconfig
@@ -941,7 +941,9 @@ CONFIG_TRACING_SUPPORT=y
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyS0,115200"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/bigsur_defconfig b/arch/mips/configs/bigsur_defconfig
index 1f0228d6f16..c2f06e38c85 100644
--- a/arch/mips/configs/bigsur_defconfig
+++ b/arch/mips/configs/bigsur_defconfig
@@ -1236,7 +1236,7 @@ CONFIG_DEBUG_MUTEXES=y
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_SAMPLES is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_SB1XXX_CORELIS is not set
# CONFIG_RUNTIME_DEBUG is not set
diff --git a/arch/mips/configs/capcella_defconfig b/arch/mips/configs/capcella_defconfig
index be81bf68e17..72b7e456916 100644
--- a/arch/mips/configs/capcella_defconfig
+++ b/arch/mips/configs/capcella_defconfig
@@ -782,7 +782,9 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="mem=32M console=ttyVR0,38400"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/cavium-octeon_defconfig b/arch/mips/configs/cavium-octeon_defconfig
index 22819d9c683..c8507bc8e92 100644
--- a/arch/mips/configs/cavium-octeon_defconfig
+++ b/arch/mips/configs/cavium-octeon_defconfig
@@ -820,7 +820,7 @@ CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set
diff --git a/arch/mips/configs/cobalt_defconfig b/arch/mips/configs/cobalt_defconfig
index b1502869378..49e61312e00 100644
--- a/arch/mips/configs/cobalt_defconfig
+++ b/arch/mips/configs/cobalt_defconfig
@@ -1125,7 +1125,7 @@ CONFIG_FRAME_WARN=1024
# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_SAMPLES is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/db1000_defconfig b/arch/mips/configs/db1000_defconfig
index 63cdea20291..68e90cd6b2d 100644
--- a/arch/mips/configs/db1000_defconfig
+++ b/arch/mips/configs/db1000_defconfig
@@ -1089,7 +1089,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/db1100_defconfig b/arch/mips/configs/db1100_defconfig
index 7ae0f9a1704..90812830e94 100644
--- a/arch/mips/configs/db1100_defconfig
+++ b/arch/mips/configs/db1100_defconfig
@@ -1089,7 +1089,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/db1200_defconfig b/arch/mips/configs/db1200_defconfig
index a6d9e1f48bb..dabf03032e0 100644
--- a/arch/mips/configs/db1200_defconfig
+++ b/arch/mips/configs/db1200_defconfig
@@ -1171,7 +1171,9 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="mem=48M"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/db1500_defconfig b/arch/mips/configs/db1500_defconfig
index a3a462b1f4e..a1513137313 100644
--- a/arch/mips/configs/db1500_defconfig
+++ b/arch/mips/configs/db1500_defconfig
@@ -1389,7 +1389,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/db1550_defconfig b/arch/mips/configs/db1550_defconfig
index bfc962ed35b..6b64339c001 100644
--- a/arch/mips/configs/db1550_defconfig
+++ b/arch/mips/configs/db1550_defconfig
@@ -1206,7 +1206,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/decstation_defconfig b/arch/mips/configs/decstation_defconfig
index 7eb6d1b4e32..cbb4d86f291 100644
--- a/arch/mips/configs/decstation_defconfig
+++ b/arch/mips/configs/decstation_defconfig
@@ -881,7 +881,7 @@ CONFIG_MAGIC_SYSRQ=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/e55_defconfig b/arch/mips/configs/e55_defconfig
index c6b1d6b29df..52968c46c80 100644
--- a/arch/mips/configs/e55_defconfig
+++ b/arch/mips/configs/e55_defconfig
@@ -560,7 +560,9 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyVR0,19200 ide0=0x1f0,0x3f6,40 mem=8M"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/fuloong2e_defconfig b/arch/mips/configs/fuloong2e_defconfig
index 17341a0b469..a09dd03aa8c 100644
--- a/arch/mips/configs/fuloong2e_defconfig
+++ b/arch/mips/configs/fuloong2e_defconfig
@@ -1710,7 +1710,7 @@ CONFIG_TRACING_SUPPORT=y
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/ip22_defconfig b/arch/mips/configs/ip22_defconfig
index 3471ac9ab9d..222d7eca2fe 100644
--- a/arch/mips/configs/ip22_defconfig
+++ b/arch/mips/configs/ip22_defconfig
@@ -1187,7 +1187,7 @@ CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_DYNAMIC_PRINTK_DEBUG=y
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/ip27_defconfig b/arch/mips/configs/ip27_defconfig
index 26127a8dd25..ed84b4cb3c8 100644
--- a/arch/mips/configs/ip27_defconfig
+++ b/arch/mips/configs/ip27_defconfig
@@ -939,7 +939,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/ip28_defconfig b/arch/mips/configs/ip28_defconfig
index ac6c850957f..dab2e5aaada 100644
--- a/arch/mips/configs/ip28_defconfig
+++ b/arch/mips/configs/ip28_defconfig
@@ -815,7 +815,7 @@ CONFIG_MAGIC_SYSRQ=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/ip32_defconfig b/arch/mips/configs/ip32_defconfig
index 56553b1a821..1841c88d3d2 100644
--- a/arch/mips/configs/ip32_defconfig
+++ b/arch/mips/configs/ip32_defconfig
@@ -1125,7 +1125,7 @@ CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/jazz_defconfig b/arch/mips/configs/jazz_defconfig
index 9db23fdffd9..14c2ab3b267 100644
--- a/arch/mips/configs/jazz_defconfig
+++ b/arch/mips/configs/jazz_defconfig
@@ -1373,7 +1373,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/jmr3927_defconfig b/arch/mips/configs/jmr3927_defconfig
index 11fec0e8a79..4d66c44cced 100644
--- a/arch/mips/configs/jmr3927_defconfig
+++ b/arch/mips/configs/jmr3927_defconfig
@@ -834,7 +834,7 @@ CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/lasat_defconfig b/arch/mips/configs/lasat_defconfig
index 2fe15a5bfed..08d481e3d42 100644
--- a/arch/mips/configs/lasat_defconfig
+++ b/arch/mips/configs/lasat_defconfig
@@ -797,7 +797,7 @@ CONFIG_MAGIC_SYSRQ=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/lemote2f_defconfig b/arch/mips/configs/lemote2f_defconfig
index ddb1c92b6f0..b71a0a4fb95 100644
--- a/arch/mips/configs/lemote2f_defconfig
+++ b/arch/mips/configs/lemote2f_defconfig
@@ -1707,7 +1707,7 @@ CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/malta_defconfig b/arch/mips/configs/malta_defconfig
index 38d98739b16..d3c601206db 100644
--- a/arch/mips/configs/malta_defconfig
+++ b/arch/mips/configs/malta_defconfig
@@ -1590,7 +1590,7 @@ CONFIG_FRAME_WARN=1024
# CONFIG_DYNAMIC_PRINTK_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/markeins_defconfig b/arch/mips/configs/markeins_defconfig
index 91375718082..6a325c02b63 100644
--- a/arch/mips/configs/markeins_defconfig
+++ b/arch/mips/configs/markeins_defconfig
@@ -1365,7 +1365,9 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyS0,115200 mem=192m ip=bootp root=/dev/nfs rw"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/mipssim_defconfig b/arch/mips/configs/mipssim_defconfig
index 513e9a416fe..f77a34e0f93 100644
--- a/arch/mips/configs/mipssim_defconfig
+++ b/arch/mips/configs/mipssim_defconfig
@@ -634,7 +634,9 @@ CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_FAULT_INJECTION is not set
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="nfsroot=192.168.192.169:/u1/mipsel,timeo=20 ip=dhcp"
+# CONFIG_CMDLINE_OVERRIDE is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set
diff --git a/arch/mips/configs/mpc30x_defconfig b/arch/mips/configs/mpc30x_defconfig
index b893f9d1379..17203056b22 100644
--- a/arch/mips/configs/mpc30x_defconfig
+++ b/arch/mips/configs/mpc30x_defconfig
@@ -816,7 +816,9 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="mem=32M console=ttyVR0,19200 ide0=0x170,0x376,73"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/msp71xx_defconfig b/arch/mips/configs/msp71xx_defconfig
index 89d2b6a9475..000d185ddf4 100644
--- a/arch/mips/configs/msp71xx_defconfig
+++ b/arch/mips/configs/msp71xx_defconfig
@@ -1411,7 +1411,7 @@ CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_FAULT_INJECTION is not set
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set
# CONFIG_MIPS_UNCACHED is not set
diff --git a/arch/mips/configs/mtx1_defconfig b/arch/mips/configs/mtx1_defconfig
index 31996689855..144b94d9a6a 100644
--- a/arch/mips/configs/mtx1_defconfig
+++ b/arch/mips/configs/mtx1_defconfig
@@ -3017,7 +3017,7 @@ CONFIG_MAGIC_SYSRQ=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/pb1100_defconfig b/arch/mips/configs/pb1100_defconfig
index c36e859ad81..ddf67f63919 100644
--- a/arch/mips/configs/pb1100_defconfig
+++ b/arch/mips/configs/pb1100_defconfig
@@ -1082,7 +1082,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/pb1500_defconfig b/arch/mips/configs/pb1500_defconfig
index 4b43e36fa1f..5ec60836b64 100644
--- a/arch/mips/configs/pb1500_defconfig
+++ b/arch/mips/configs/pb1500_defconfig
@@ -1199,7 +1199,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/pb1550_defconfig b/arch/mips/configs/pb1550_defconfig
index 7c8d351ad1c..6647642b5d9 100644
--- a/arch/mips/configs/pb1550_defconfig
+++ b/arch/mips/configs/pb1550_defconfig
@@ -1192,7 +1192,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/pnx8335-stb225_defconfig b/arch/mips/configs/pnx8335-stb225_defconfig
index 77a75f01197..848344d588d 100644
--- a/arch/mips/configs/pnx8335-stb225_defconfig
+++ b/arch/mips/configs/pnx8335-stb225_defconfig
@@ -1033,7 +1033,7 @@ CONFIG_FRAME_WARN=1024
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
# CONFIG_KERNEL_TESTS is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/pnx8550-jbs_defconfig b/arch/mips/configs/pnx8550-jbs_defconfig
index 945b27e1332..9d721fdccb3 100644
--- a/arch/mips/configs/pnx8550-jbs_defconfig
+++ b/arch/mips/configs/pnx8550-jbs_defconfig
@@ -1214,7 +1214,9 @@ CONFIG_DEBUG_MUTEXES=y
CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyS1,38400n8 root=/dev/nfs ip=bootp"
+# CONFIG_CMDLINE_OVERRIDE is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set
diff --git a/arch/mips/configs/pnx8550-stb810_defconfig b/arch/mips/configs/pnx8550-stb810_defconfig
index ff0fc0bedb2..ab07ec08c6f 100644
--- a/arch/mips/configs/pnx8550-stb810_defconfig
+++ b/arch/mips/configs/pnx8550-stb810_defconfig
@@ -1204,7 +1204,9 @@ CONFIG_DEBUG_SLAB=y
CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyS1,38400n8 root=/dev/nfs ip=bootp"
+# CONFIG_CMDLINE_OVERRIDE is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set
diff --git a/arch/mips/configs/powertv_defconfig b/arch/mips/configs/powertv_defconfig
index 86c8007c174..7291633d81c 100644
--- a/arch/mips/configs/powertv_defconfig
+++ b/arch/mips/configs/powertv_defconfig
@@ -1418,7 +1418,9 @@ CONFIG_BRANCH_PROFILE_NONE=y
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
# CONFIG_KMEMCHECK is not set
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="rw dhash_entries=1024 ihash_entries=1024 ip=10.0.1.3:10.0.1.1:10.0.1.1:255.255.255.0:zeus:eth0: root=/dev/nfs nfsroot=/nfsroot/cramfs,wsize=512,rsize=512,tcp nokgdb console=ttyUSB0,115200 memsize=252M"
+# CONFIG_CMDLINE_OVERRIDE is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set
diff --git a/arch/mips/configs/rb532_defconfig b/arch/mips/configs/rb532_defconfig
index a9408dbe0d2..57a50483abd 100644
--- a/arch/mips/configs/rb532_defconfig
+++ b/arch/mips/configs/rb532_defconfig
@@ -1203,7 +1203,7 @@ CONFIG_FRAME_WARN=1024
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/rbtx49xx_defconfig b/arch/mips/configs/rbtx49xx_defconfig
index 1c9a5428aea..21c2022d46e 100644
--- a/arch/mips/configs/rbtx49xx_defconfig
+++ b/arch/mips/configs/rbtx49xx_defconfig
@@ -1061,7 +1061,7 @@ CONFIG_TRACING_SUPPORT=y
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/rm200_defconfig b/arch/mips/configs/rm200_defconfig
index 5873fc50005..79036289003 100644
--- a/arch/mips/configs/rm200_defconfig
+++ b/arch/mips/configs/rm200_defconfig
@@ -1693,7 +1693,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
#
# Security options
diff --git a/arch/mips/configs/sb1250-swarm_defconfig b/arch/mips/configs/sb1250-swarm_defconfig
index 5244716b67f..7f07bf02b83 100644
--- a/arch/mips/configs/sb1250-swarm_defconfig
+++ b/arch/mips/configs/sb1250-swarm_defconfig
@@ -960,7 +960,7 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
# CONFIG_SB1XXX_CORELIS is not set
#
diff --git a/arch/mips/configs/tb0219_defconfig b/arch/mips/configs/tb0219_defconfig
index 937b47cbb4a..c54d1128f9a 100644
--- a/arch/mips/configs/tb0219_defconfig
+++ b/arch/mips/configs/tb0219_defconfig
@@ -891,7 +891,9 @@ CONFIG_FRAME_WARN=1024
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="cca=3 mem=64M console=ttyVR0,115200 ip=any root=/dev/nfs"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/tb0226_defconfig b/arch/mips/configs/tb0226_defconfig
index da735840490..e7c5cd32a2b 100644
--- a/arch/mips/configs/tb0226_defconfig
+++ b/arch/mips/configs/tb0226_defconfig
@@ -894,7 +894,9 @@ CONFIG_FRAME_WARN=1024
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="cca=3 mem=32M console=ttyVR0,115200"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/tb0287_defconfig b/arch/mips/configs/tb0287_defconfig
index 99a0d21b8b2..b50032ba4d0 100644
--- a/arch/mips/configs/tb0287_defconfig
+++ b/arch/mips/configs/tb0287_defconfig
@@ -1076,7 +1076,9 @@ CONFIG_FRAME_WARN=1024
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="cca=3 mem=64M console=ttyVR0,115200 ip=any root=/dev/nfs"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/workpad_defconfig b/arch/mips/configs/workpad_defconfig
index d3646ea51c2..c02ba08b69a 100644
--- a/arch/mips/configs/workpad_defconfig
+++ b/arch/mips/configs/workpad_defconfig
@@ -754,7 +754,9 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyVR0,19200 ide0=0x170,0x376,49 mem=16M"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/wrppmc_defconfig b/arch/mips/configs/wrppmc_defconfig
index c137831cc6a..a35bc41389e 100644
--- a/arch/mips/configs/wrppmc_defconfig
+++ b/arch/mips/configs/wrppmc_defconfig
@@ -886,7 +886,9 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
+CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE="console=ttyS0,115200n8"
+# CONFIG_CMDLINE_OVERRIDE is not set
#
# Security options
diff --git a/arch/mips/configs/yosemite_defconfig b/arch/mips/configs/yosemite_defconfig
index 4a04f0c1fa8..e3d68d651e7 100644
--- a/arch/mips/configs/yosemite_defconfig
+++ b/arch/mips/configs/yosemite_defconfig
@@ -823,7 +823,7 @@ CONFIG_DEBUG_MUTEXES=y
CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_BOOL is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_RUNTIME_DEBUG is not set
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index bd55f71055b..f9513f9e61d 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -58,8 +58,12 @@ EXPORT_SYMBOL(mips_machtype);
struct boot_mem_map boot_mem_map;
-static char command_line[COMMAND_LINE_SIZE];
- char arcs_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
+static char __initdata command_line[COMMAND_LINE_SIZE];
+char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
+
+#ifdef CONFIG_CMDLINE_BOOL
+static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
+#endif
/*
* mips_io_port_base is the begin of the address space to which x86 style
@@ -458,8 +462,20 @@ static void __init arch_mem_init(char **cmdline_p)
pr_info("Determined physical RAM map:\n");
print_memory_map();
- strlcpy(command_line, arcs_cmdline, sizeof(command_line));
- strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
+#ifdef CONFIG_CMDLINE_BOOL
+#ifdef CONFIG_CMDLINE_OVERRIDE
+ strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+#else
+ if (builtin_cmdline[0]) {
+ strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
+ strlcat(arcs_cmdline, builtin_cmdline, COMMAND_LINE_SIZE);
+ }
+ strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
+#endif
+#else
+ strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE);
+#endif
+ strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;