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When a device is opened for RW closing it can trigger other actions, like udev scanning it for partition changes. Use read only for the init_* methods and RW for actual changes to the device. This adds _device_open which takes mode flags as an argument and turns linux_open into a wrapper for it with RW_MODE. _device_open_ro is added to open the device with RD_MODE and increment the open_counter. This is used in the init_* functions. _device_close is a wrapper around linux_close that decrements the open_counter and is used in the init_* functions. All of these changes are self-contained with no external API changes. The only visible change in behavior is that when a new PedDevice is created the device is opened in RO_MODE instead of RW_MODE. Resolves: rhbz#1245144 Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1283112 Upstream patch: http://git.savannah.gnu.org/cgit/parted.git/commit/?id=44d5ae0115c4ecfe3158748309e9912c5aede92d (From OE-Core rev: f68fca4776a38a1bdf7ed37ce87cddbb21ff74f8) Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
QEMU Emulation Targets ====================== To simplify development, the build system supports building images to work with the QEMU emulator in system emulation mode. Several architectures are currently supported in 32 and 64 bit variants: * ARM (qemuarm + qemuarm64) * x86 (qemux86 + qemux86-64) * PowerPC (qemuppc + qemuppc64) * MIPS (qemumips + qemumips64) Use of the QEMU images is covered in the Yocto Project Reference Manual. The appropriate MACHINE variable value corresponding to the target is given in brackets.