This tries to catch all cases where grub_cpu_to_XXX was used for constant
expressions (including sizeof).

	Reuse the same tag on retries.

	Just "packed" doesn't always pack the way we expect.

	(grub_usbms_cbi_reset): Likewise.
	(grub_usbms_bo_reset): Likewise.
	(grub_usbms_reset): Likewise.
	(grub_usbms_attach): Likewise.
	(grub_usbms_transfer_cbi): Likewise.

	due to delayed attach.

	descriptor to just receive it as argument rather than endpoint
	address.

* include/grub/arc/arc.h (grub_arc_iterate_devs_hook_t): New type.
(grub_arc_iterate_devs): Add hook_data argument.
* include/grub/ata.h (grub_ata_dev_iterate_hook_t): New type.
(struct grub_ata_dev.iterate): Add hook_data argument.
* include/grub/device.h (grub_device_iterate_hook_t): New type.
(grub_device_iterate): Add hook_data argument.
* include/grub/disk.h (grub_disk_dev_iterate_hook_t): New type.
(struct grub_disk_dev.iterate): Add hook_data argument.
(grub_disk_dev_iterate): Likewise.
* include/grub/gpt_partition.h (grub_gpt_partition_map_iterate):
Likewise.
* include/grub/msdos_partition.h (grub_partition_msdos_iterate):
Likewise.
* include/grub/partition.h (grub_partition_iterate_hook_t): New
type.
(struct grub_partition_map.iterate): Add hook_data argument.
(grub_partition_iterate): Likewise.
* include/grub/scsi.h (grub_scsi_dev_iterate_hook_t): New type.
(struct grub_scsi_dev.iterate): Add hook_data argument.

Update all callers.

	* grub-core/disk/scsi.c (grub_scsi_write10): Uncomment. Make buffer
	a const pointer.
	(grub_scsi_write): Implement.
	* include/grub/scsi.h (grub_scsi_dev): Make write buffer a const pointer

	guidelines.

	* grub-core/kern/dl.c (grub_dl_check_license): New function.
	(grub_dl_load_core): Use grub_dl_check_license.
	* include/grub/dl.h (GRUB_MOD_SECTION): New macro.
	(GRUB_MOD_LICENSE): Likewise.
	(GRUB_MOD_DUAL_LICENSE): Likewise.
	All modules updated.

	into GRUB-style one.

	* grub-core/bus/usb/usbhub.c (hubs): Likewise.
	* grub-core/commands/hashsum.c (aliases): Likewise.
	* grub-core/commands/setpci.c (pci_registers): Likewise.
	* grub-core/disk/usbms.c (attach_hook): Likewise.
	* grub-core/fs/zfs/zfs.c (decomp_table): Likewise.
	(zio_checksum_table): Likewise.
	* grub-core/gettext/gettext.c (grub_gettext_msg_list): Likewise.
	* grub-core/gfxmenu/gfxmenu.c (cached_view): Likewise.
	* grub-core/lib/legacy_parse.c (legacy_commands): Likewise.
	* grub-core/lib/relocator.c (leftovers): Likewise.
	(extra_blocks): Likewise.
	* grub-core/loader/i386/bsd.c (relocator): Likewise.
	* grub-core/loader/i386/multiboot_mbi.c (modules): Likewise.
	(modules_last): Likewise.
	* grub-core/loader/i386/xnu.c (table_aliases): Likewise.
	(devices): Likewise.
	* grub-core/loader/multiboot_mbi2.c (modules): Likewise.
	(modules_last): Likewise.
	* grub-core/normal/auth.c (users): Likewise.
	* grub-core/normal/context.c (initial_menu): Likewise.
	(current_menu): Likewise.
	* grub-core/normal/crypto.c (crypto_specs): Likewise.
	* grub-core/term/serial.c (grub_serial_ports): Likewise.
	(grub_serial_terminfo_input_template): Likewise.
	(grub_serial_terminfo_output_template): Likewise.
	(grub_serial_terminfo_input): Likewise.
	(grub_serial_terminfo_output): Likewise.
	(registered): Likewise.
	* grub-core/term/usb_keyboard.c (attach_hook): Likewise.

	* disk/usbms.c (grub_usbms_transfer): Fix double semicolon.
	* fs/xfs.c (grub_xfs_dir): Likewise.
	* fs/afs.c (grub_afs_dir): Likewise.
	* fs/iso9660.c (grub_iso9660_iterate_dir): Likewise.
	(grub_iso9660_open): Likewise.
	* fs/jfs.c (grub_jfs_open): Likewise.
	* fs/ext2.c (grub_ext2_dir): Likewise.
	* include/grub/macho.h (grub_macho_fat_arch): Likewise.
	* script/sh/lexer.c (grub_script_yylex): Likewise.
	

	* kern/mm.c (grub_zalloc): New function.
	(grub_debug_zalloc): Likewise.
	* include/grub/mm.h: Declare grub_zalloc() and
	grub_debug_zalloc().
	* util/misc.c (grub_zalloc): New function.
	* bus/usb/uhci.c (grub_uhci_pci_iter): Use grub_zalloc()
	instead of grub_malloc(), remove unneeded initializations.
	* bus/usb/usbhub.c (grub_usb_hub_add_dev): Likewise.
	* commands/extcmd.c (grub_extcmd_dispatcher): Likewise.
	* commands/parttool.c (grub_cmd_parttool): Likewise.
	* disk/i386/pc/biosdisk.c (grub_biosdisk_open): Likewise.
	* disk/raid5_recover.c (grub_raid5_recover): Likewise.
	* disk/raid6_recover.c (grub_raid6_recover): Likewise.
	* disk/usbms.c (grub_usbms_finddevs): Likewise.
	* efiemu/mm.c (grub_efiemu_request_memalign): Likewise.
	* efiemu/pnvram.c (grub_efiemu_pnvram): Likewise.
	(grub_cmd_efiemu_pnvram): Likewise.
	* fs/i386/pc/pxe.c (grub_pxefs_open): Likewise.
	* fs/iso9660.c (grub_iso9660_mount): Likewise.
	(grub_iso9660_iterate_dir): Likewise.
	* fs/jfs.c (grub_jfs_opendir): Likewise.
	* fs/ntfs.c (list_file): Likewise.
	(grub_ntfs_mount): Likewise.
	* kern/disk.c (grub_disk_open): Likewise.
	* kern/dl.c (grub_dl_load_core): Likewise.
	* kern/elf.c (grub_elf_file): Likewise.
	* kern/env.c (grub_env_context_open): Likewise.
	(grub_env_set): Likewise.
	(grub_env_set_data_slot): Likewise.
	* kern/file.c (grub_file_open): Likewise.
	* kern/fs.c (grub_fs_blocklist_open): Likewise.
	* loader/i386/multiboot.c (grub_module): Likewise.
	* loader/xnu.c (grub_xnu_create_key): Likewise.
	(grub_xnu_create_value): Likewise.
	* normal/main.c (grub_normal_add_menu_entry): Likewise.
	(read_config_file): Likewise.
	* normal/menu_entry.c (make_screen): Likewise.
	* partmap/sun.c (sun_partition_map_iterate): Likewise.
	* script/sh/lexer.c (grub_script_lexer_init): Likewise.
	* script/sh/script.c (grub_script_parse): Likewise.
	* video/bitmap.c (grub_video_bitmap_create): Likewise.
	* video/readers/jpeg.c (grub_video_reader_jpeg): Likewise.
	* video/readers/png.c (grub_png_output_byte): Likewise.
	(grub_video_reader_png): Likewise.

	Fix hang and segmentation fault in grub-emu-usb

	* disk/scsi.c (grub_scsi_open): return err and not grub_errno
	* util/usb.c (grub_libusb_devices): likewise
	(grub_libusb_init): rename to ...
	(GRUB_MOD_INIT (libusb)):...this
	(grub_libusb_fini): rename to ..
	(GRUB_MOD_FINI (libusb)):...this
	* disk/usbms.c (grub_usbms_transfer): fix retry logic
	* include/grub/disk.h (grub_raid_init): removed, it's useless
	(grub_raid_fini): likewise
	(grub_lvm_init): likewise
	(grub_lvm_fini): likewise
	* util/grub-emu.c (main): don't call grub_libusb_init, it's done
	by grub_init_all

	* disk/usbms.c (grub_usbms_transfer): Initialize `err' to fix
	a compiler warning.

	* disk/ata.c: Spelling fixes.
	* disk/raid.c: Likewise.
	* disk/usbms.c: Likewise.
	* disk/dmraid_nvidia.c: Likewise.
	* kern/ieee1275/openfw.c: Likewise.
	* kern/ieee1275/init.c: Likewise.
	* kern/ieee1275/cmain.c: Likewise.
	* boot/i386/pc/cdboot.S: Likewise.
	* video/readers/png.c: Likewise.
	* video/i386/pc/vbe.c: Likewise.
	* fs/udf.c: Likewise.
	* fs/hfs.c: Likewise.
	* fs/reiserfs.c: Likewise.
	* efiemu/runtime/efiemu.c: Likewise.
	* efiemu/main.c: Likewise.
	* efiemu/mm.c: Likewise.
	* include/grub/elf.h: Likewise.
	* include/grub/xnu.h: Likewise.
	* include/grub/usbdesc.h: Likewise.
	* include/grub/usb.h: Likewise.
	* include/grub/script_sh.h: Likewise.
	* include/grub/lib/LzmaEnc.h: Likewise.
	* include/grub/efiemu/efiemu.h: Likewise.
	* include/grub/command.h: Likewise.
	* normal/menu.c: Likewise.
	* normal/main.c: Likewise.
	* normal/datetime.c: Likewise.
	* bus/usb/uhci.c: Likewise.
	* mmap/i386/uppermem.c: Likewise.
	* mmap/mmap.c: Likewise.
	* commands/acpi.c: Likewise.
	* commands/test.c: Likewise.
	* partmap/apple.c: Likewise.
	* font/font.c: Likewise.
	* loader/sparc64/ieee1275/linux.c: Likewise.
	* loader/macho.c: Likewise.
	* loader/i386/bsd_trampoline.S: Likewise.
	* loader/i386/bsd.c: Likewise.
	* loader/xnu.c: Likewise.
	* term/i386/pc/vesafb.c: Likewise.
	* term/usb_keyboard.c: Likewise.
	* util/resolve.c: Likewise.
	* util/getroot.c: Likewise.

        * Makefile.in (enable_grub_emu_usb): New variable.
        * conf/i386-pc.rmk (grub_emu_SOURCES): Add `disk/scsi.c'.
        (grub_emu_SOURCES) [grub_emu_SOURCES]: Add `disk/usbms.c',
        `util/usb.c', `bus/usb/usb.c' and `commands/usbtest.c'.
        (grub_emu_LDFLAGS): Add `$(LIBUSB)'.
        (pkglib_MODULES): Add `usb.mod', `uhci.mod', `ohci.mod',
        `usbtest.mod' and `usbms.mod'.
        (usb_mod_SOURCES, usb_mod_CFLAGS, usb_mod_LDFLAGS)
        (usbtest_mod_SOURCES, usbtest_mod_CFLAGS, usbtest_mod_LDFLAGS)
        (uhci_mod_SOURCES, uhci_mod_CFLAGS, uhci_mod_LDFLAGS,
        (ohci_mod_SOURCES, ohci_mod_CFLAGS, ohci_mod_LDFLAGS)
        (usbms_mod_SOURCES, usbms_mod_CFLAGS, usbms_mod_LDFLAGS): New
        variables.

        * disk/usbms.c: New file.

        * include/grub/usb.h: Likewise.

        * include/grub/usbtrans.h: Likewise.

        * include/grub/usbdesc.h: Likewise.

        * bus/usb/usbtrans.c: Likewise.

        * bus/usb/ohci.c: Likewise.

        * bus/usb/uhci.c: Likewise.

        * bus/usb/usbhub.c: Likewise.

        * bus/usb/usb.c: Likewise.

        * commands/usbtest.c: Likewise.

        * util/usb.c: Likewise.

        * include/grub/err.h (grub_err_t): Add `GRUB_ERR_IO'.

        * configure.ac: Test for libusb presence.

        * util/grub-emu.c (main) [HAVE_LIBUSB_H]: Call `grub_libusb_init'.