• Yury Norov's avatar
    32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option · 942fa985
    Yury Norov authored
    All new 32-bit architectures should have 64-bit userspace off_t type, but
    existing architectures has 32-bit ones.
    
    To enforce the rule, new config option is added to arch/Kconfig that defaults
    ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing
    32-bit architectures enable it explicitly.
    
    New option affects force_o_largefile() behaviour. Namely, if userspace
    off_t is 64-bits long, we have no reason to reject user to open big files.
    
    Note that even if architectures has only 64-bit off_t in the kernel
    (arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32),
    a libc may use 32-bit off_t, and therefore want to limit the file size
    to 4GB unless specified differently in the open flags.
    Signed-off-by: default avatarYury Norov <ynorov@caviumnetworks.com>
    Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarYury Norov <ynorov@marvell.com>
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    942fa985
Kconfig 20.6 KB