diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index 23817bc7a26acc78c6497c50842653b47e1b92ae..d2b88a0be5199715b003668f5c528a0c6cefcafe 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 1d5ec3c11c75368da5af21b3752d003622853007..5a5b6ba7514e0791f2fd74bc9cadd0ea1b0c280c 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 8715de1d8092813cb6466e5e45a380066c837b6c..267bd46120bc7e05f6c5de5b5cfd9ed2c3fb2f3c 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 efa65982239e5da75441439302719d8065d039ea..7fee0273c82935f7a420081ceaed30e71d4774eb 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 1f0228d6f16e1942c4e95b9df95e490ad303cf7e..c2f06e38c8546770d2bacd7b93d9248b9803a2ef 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 be81bf68e170f9d2569e2a3c04e742e41ba95f6b..72b7e456916e2b9f8e3bde70c3338a6b9074a799 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 22819d9c683a9d829af617946f37e5befa4288df..c8507bc8e925b4141584080cde843a2d5a07c198 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 b150286937856b510d74d20a3479af280628cd21..49e61312e006e252a3ce96d4972262625b4f1ccd 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 63cdea2029114ab22d76ab0c6eabf6d1626e96a5..68e90cd6b2d4a9f6d7fc102debd540c0dc5ac296 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 7ae0f9a1704d06a99991e1b2d8b071a7b1fc1f93..90812830e940c560ed44da60a8e457778ea46095 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 a6d9e1f48bba893254ae449c0d4aa533049adf6a..dabf03032e06155d03e30f3091cc03cace3638da 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 a3a462b1f4e28388b08b8fae59688dd2151b7578..a151313731381c5be32c574eeff84641fa297da6 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 bfc962ed35b2cb47f8dd6698a83a89919ee173e6..6b64339c0014ada688a086d4389479df40fe603c 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 7eb6d1b4e322c717b47c6cd12c6ee046793745cd..cbb4d86f2912d4fd1ea4abdb9659e3268ad35256 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 c6b1d6b29dfcb766602e440abba81b1ab5c8ce97..52968c46c806ad0c7420db724ece5da49ca2de73 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 17341a0b4695c77d766ede9c0f6b591ccd376bf8..a09dd03aa8c8be2fe2177e7f61e76d14f8c68018 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 3471ac9ab9db7f6d22945bde1fe7740b6521227f..222d7eca2fe4afd7ac516c2d69bd3d182785b299 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 26127a8dd25d2e4a7cd2a0a07793d11e0c114a2d..ed84b4cb3c8dc2d0f7ac49fbbf9cfbf6967da512 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 ac6c850957f3d077b63113eddab0bcf283a23b85..dab2e5aaadaf5993f3680482b22299b65d42eac4 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 56553b1a821c4d40eb067da84860e9ea212e4185..1841c88d3d242c7dca05e60d9656fb5c30d2eebe 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 9db23fdffd9e5ced9620addf61ddc38f053e6f78..14c2ab3b267400937fa6bb1f79daeb335a9b05c7 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 11fec0e8a792ff361701f055e2ed048010b6c35a..4d66c44cced82f09e73911c977004ae359477c72 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 2fe15a5bfed894d41f1fd2a7a610fa31e7f4ce8b..08d481e3d42ae582ba214d76d3bffff84fa0afef 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 ddb1c92b6f061cc4e1bf43654551f3bf09cb703a..b71a0a4fb95f227c7e5fe78990cad427fa09b179 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 38d98739b165673c75a5a34017801e19f6aeaabb..d3c601206db2e3dee8e82ade72194f7070f8aaf0 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 91375718082d18a67849ce1de2ffd14a0cb5800e..6a325c02b63c2a2f84f7c828bf88a0c55848c6ae 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 513e9a416feee0a67cce76f8a6784a5aedcc2be3..f77a34e0f93814ab9ed02c26d90cb9b40dea421e 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 b893f9d13790a6b11a2ef47f0fe3ac69861e62a1..17203056b22ba06801b8b61187178daddeead0d4 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 89d2b6a9475c6462d27f2ca24b687a70062cb714..000d185ddf42764fd79427fa6362ac43c0ee91e6 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 31996689855534b88bab1a3241e687b047e14cdf..144b94d9a6ad7b208b8e9d08853264e82d35fe97 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 c36e859ad81135ffb99443f9c54a69ecfabe28a5..ddf67f63919495bd1639a6b732fe37ec1744ba3b 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 4b43e36fa1fe580b4fc4b313ef33acaed3ad1fdd..5ec60836b6451048d07f5f4e1c5ad27bfff1bb01 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 7c8d351ad1cc89af0963ac30d3e0fa12b1f8da37..6647642b5d9713281d7047b523438619f454223d 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 77a75f011973042a19ef97d1febd6e1e744b6b1a..848344d588d127f7a9b08cc9c4a84954e9a46469 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 945b27e13324c566c08f9545940f2b07b0415593..9d721fdccb304aeb31a0cd277e14ef301123181a 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 ff0fc0bedb2f17aaf43f03cd188a408e1110e18e..ab07ec08c6fab6371a2d306978c43963da901e3a 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 86c8007c1743c34adf2b62dd4888f706b7c917fe..7291633d81ccf9f80962fa95ba569293bff24fd5 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 a9408dbe0d2a5f05e961a8463ea019e7def3816d..57a50483abdf9069a080a3a6c11e564bc74a9dba 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 1c9a5428aeab9e046fe2d81d753f57f000ff029d..21c2022d46eeb567d5a3a92a390ce80584540b6d 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 5873fc50005e2c6a2d9a3db0ac1c24d58f8f58ab..7903628900331473748a4bf698c33923d9466cc7 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 5244716b67fc636587e341ea8547996eaaa23af9..7f07bf02b838e100c67b346b75e3f8cd9e59a39d 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 937b47cbb4a8e3dfac159322ef5bb628c96f0ea7..c54d1128f9a398e2f9edfe40d5632a36bfbe5daf 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 da73584049041f882f9363bd9ff78d6b7a536e32..e7c5cd32a2bd90bfaa9c9a88285fbeb9adf82ea6 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 99a0d21b8b224367ee37e128c7b313cfff207af6..b50032ba4d01b3cd01644d4d9f5cf6b6a9ad35e7 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 d3646ea51c2111f35bf14adda5bcc96ec566dded..c02ba08b69ab7747c536be814716e990bbd71815 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 c137831cc6a18be0fdb412187c5aefea0d839a42..a35bc41389e59392e27170c52897ee570b820ab1 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 4a04f0c1fa86a1ef8c70403ea6af0a0617fd46a9..e3d68d651e7d9c96634c4d3a88cd1c12bbc4f66d 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 bd55f71055ba31a1e2ef4488bb3dfc0d4beb7afc..f9513f9e61d3f13973b36ec7bf6611db242afc24 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;