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    Subject[PATCH 10/15] misc: Make *[ug]id16 support optional
    Configurable 16-bit UID and friends support

    This allows turning off the legacy 16 bit UID interfaces on embedded platforms.

    text data bss dec hex filename
    3330172 529036 190556 4049764 3dcb64 vmlinux-baseline
    3328268 529040 190556 4047864 3dc3f8 vmlinux

    Signed-off-by: Matt Mackall <mpm@selenic.com>

    Index: 2.6.14-misc/init/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/init/Kconfig 2005-11-09 11:21:02.000000000 -0800
    +++ 2.6.14-misc/init/Kconfig 2005-11-09 11:22:06.000000000 -0800
    @@ -364,7 +364,16 @@ config SYSENTER
    help
    Disabling this feature removes sysenter handling as well as
    vsyscall fixmaps.
    -
    +
    +config UID16
    + bool "Enable 16-bit UID system calls" if EMBEDDED
    + depends !ALPHA && !PPC && !PPC64 && !PARISC && !V850 && !ARCH_S390X
    + depends !X86_64 || IA32_EMULATION
    + depends !SPARC64 || SPARC32_COMPAT
    + help
    + This enables the legacy 16-bit UID syscall wrappers.
    +
    +
    config CC_OPTIMIZE_FOR_SIZE
    bool "Optimize for size" if EMBEDDED
    default y if ARM || H8300
    Index: 2.6.14-misc/arch/sparc/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/sparc/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/sparc/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -9,10 +9,6 @@ config MMU
    bool
    default y

    -config UID16
    - bool
    - default y
    -
    config HIGHMEM
    bool
    default y
    Index: 2.6.14-misc/arch/arm26/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/arm26/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/arm26/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -34,10 +34,6 @@ config FORCE_MAX_ZONEORDER
    int
    default 9

    -config UID16
    - bool
    - default y
    -
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/m68k/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/m68k/Kconfig 2005-11-01 10:54:31.000000000 -0800
    +++ 2.6.14-misc/arch/m68k/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -10,10 +10,6 @@ config MMU
    bool
    default y

    -config UID16
    - bool
    - default y
    -
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/ppc64/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/ppc64/Kconfig 2005-11-01 10:54:32.000000000 -0800
    +++ 2.6.14-misc/arch/ppc64/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -13,9 +13,6 @@ config MMU
    config PPC_STD_MMU
    def_bool y

    -config UID16
    - bool
    -
    config RWSEM_GENERIC_SPINLOCK
    bool

    Index: 2.6.14-misc/arch/sh/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/sh/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/sh/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -14,10 +14,6 @@ config SUPERH
    gaming console. The SuperH port has a home page at
    <http://www.linux-sh.org/>.

    -config UID16
    - bool
    - default y
    -
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/s390/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/s390/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/s390/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -27,11 +27,6 @@ config ARCH_S390
    bool
    default y

    -config UID16
    - bool
    - default y
    - depends on ARCH_S390X = 'n'
    -
    source "init/Kconfig"

    menu "Base setup"
    Index: 2.6.14-misc/arch/cris/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/cris/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/cris/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -9,10 +9,6 @@ config MMU
    bool
    default y

    -config UID16
    - bool
    - default y
    -
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/x86_64/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/x86_64/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/x86_64/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -517,11 +517,6 @@ config SYSVIPC_COMPAT
    depends on COMPAT && SYSVIPC
    default y

    -config UID16
    - bool
    - depends on IA32_EMULATION
    - default y
    -
    endmenu

    source "net/Kconfig"
    Index: 2.6.14-misc/arch/arm/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/arm/Kconfig 2005-11-01 10:54:31.000000000 -0800
    +++ 2.6.14-misc/arch/arm/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -46,10 +46,6 @@ config MCA
    <file:Documentation/mca.txt> (and especially the web page given
    there) before attempting to build an MCA bus kernel.

    -config UID16
    - bool
    - default y
    -
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/um/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/um/Kconfig 2005-11-01 10:54:32.000000000 -0800
    +++ 2.6.14-misc/arch/um/Kconfig 2005-11-09 11:22:29.000000000 -0800
    @@ -23,10 +23,6 @@ config SBUS
    config PCI
    bool

    -config UID16
    - bool
    - default y
    -
    config GENERIC_CALIBRATE_DELAY
    bool
    default y
    Index: 2.6.14-misc/arch/m68knommu/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/m68knommu/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/m68knommu/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -17,10 +17,6 @@ config FPU
    bool
    default n

    -config UID16
    - bool
    - default y
    -
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/ppc/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/ppc/Kconfig 2005-11-01 10:54:32.000000000 -0800
    +++ 2.6.14-misc/arch/ppc/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -8,9 +8,6 @@ config MMU
    bool
    default y

    -config UID16
    - bool
    -
    config GENERIC_HARDIRQS
    bool
    default y
    Index: 2.6.14-misc/arch/parisc/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/parisc/Kconfig 2005-11-01 10:54:31.000000000 -0800
    +++ 2.6.14-misc/arch/parisc/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -19,9 +19,6 @@ config MMU
    config STACK_GROWSUP
    def_bool y

    -config UID16
    - bool
    -
    config RWSEM_GENERIC_SPINLOCK
    def_bool y

    Index: 2.6.14-misc/arch/sparc64/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/sparc64/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/sparc64/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -305,11 +305,6 @@ config COMPAT
    depends on SPARC32_COMPAT
    default y

    -config UID16
    - bool
    - depends on SPARC32_COMPAT
    - default y
    -
    config BINFMT_ELF32
    tristate "Kernel support for 32-bit ELF binaries"
    depends on SPARC32_COMPAT
    Index: 2.6.14-misc/arch/v850/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/v850/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/v850/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -10,9 +10,6 @@ mainmenu "uClinux/v850 (w/o MMU) Kernel
    config MMU
    bool
    default n
    -config UID16
    - bool
    - default n
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/h8300/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/h8300/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/h8300/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -21,10 +21,6 @@ config FPU
    bool
    default n

    -config UID16
    - bool
    - default y
    -
    config RWSEM_GENERIC_SPINLOCK
    bool
    default y
    Index: 2.6.14-misc/arch/alpha/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/alpha/Kconfig 2005-10-27 17:02:08.000000000 -0700
    +++ 2.6.14-misc/arch/alpha/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -18,9 +18,6 @@ config MMU
    bool
    default y

    -config UID16
    - bool
    -
    config RWSEM_GENERIC_SPINLOCK
    bool

    Index: 2.6.14-misc/arch/i386/Kconfig
    ===================================================================
    --- 2.6.14-misc.orig/arch/i386/Kconfig 2005-11-01 10:54:31.000000000 -0800
    +++ 2.6.14-misc/arch/i386/Kconfig 2005-11-09 11:21:09.000000000 -0800
    @@ -29,10 +29,6 @@ config MMU
    config SBUS
    bool

    -config UID16
    - bool
    - default y
    -
    config GENERIC_ISA_DMA
    bool
    default y
    Index: 2.6.14-misc/kernel/sys_ni.c
    ===================================================================
    --- 2.6.14-misc.orig/kernel/sys_ni.c 2005-11-09 11:20:21.000000000 -0800
    +++ 2.6.14-misc/kernel/sys_ni.c 2005-11-09 11:22:56.000000000 -0800
    @@ -84,6 +84,25 @@ cond_syscall(sys_inotify_add_watch);
    cond_syscall(sys_inotify_rm_watch);
    cond_syscall(sys_vm86old);
    cond_syscall(sys_vm86);
    +cond_syscall(sys_chown16);
    +cond_syscall(sys_fchown16);
    +cond_syscall(sys_getegid16);
    +cond_syscall(sys_geteuid16);
    +cond_syscall(sys_getgid16);
    +cond_syscall(sys_getgroups16);
    +cond_syscall(sys_getresgid16);
    +cond_syscall(sys_getresuid16);
    +cond_syscall(sys_getuid16);
    +cond_syscall(sys_lchown16);
    +cond_syscall(sys_setfsgid16);
    +cond_syscall(sys_setfsuid16);
    +cond_syscall(sys_setgid16);
    +cond_syscall(sys_setgroups16);
    +cond_syscall(sys_setregid16);
    +cond_syscall(sys_setresgid16);
    +cond_syscall(sys_setresuid16);
    +cond_syscall(sys_setreuid16);
    +cond_syscall(sys_setuid16);

    /* arch-specific weak syscall entries */
    cond_syscall(sys_pciconfig_read);
    -
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