c89388d301
Changes in 4.9.138 powerpc/eeh: Fix possible null deref in eeh_dump_dev_log() tty: check name length in tty_find_polling_driver() ARM: imx_v6_v7_defconfig: Select CONFIG_TMPFS_POSIX_ACL powerpc/nohash: fix undefined behaviour when testing page size support drm/omap: fix memory barrier bug in DMM driver media: pci: cx23885: handle adding to list failure MIPS: kexec: Mark CPU offline before disabling local IRQ powerpc/boot: Ensure _zimage_start is a weak symbol MIPS/PCI: Call pcie_bus_configure_settings() to set MPS/MRRS sc16is7xx: Fix for multi-channel stall media: tvp5150: fix width alignment during set_selection() powerpc/selftests: Wait all threads to join 9p locks: fix glock.client_id leak in do_lock 9p: clear dangling pointers in p9stat_free cdrom: fix improper type cast, which can leat to information leak. scsi: qla2xxx: Fix incorrect port speed being set for FC adapters scsi: qla2xxx: shutdown chip if reset fail fuse: Fix use-after-free in fuse_dev_do_read() fuse: Fix use-after-free in fuse_dev_do_write() fuse: fix blocked_waitq wakeup fuse: set FR_SENT while locked mm: do not bug_on on incorrect length in __mm_populate() e1000: avoid null pointer dereference on invalid stat type e1000: fix race condition between e1000_down() and e1000_watchdog bna: ethtool: Avoid reading past end of buffer parisc: Align os_hpmc_size on word boundary parisc: Fix HPMC handler by increasing size to multiple of 16 bytes parisc: Fix exported address of os_hpmc handler MIPS: Loongson-3: Fix CPU UART irq delivery problem MIPS: Loongson-3: Fix BRIDGE irq delivery problem xtensa: add NOTES section to the linker script xtensa: make sure bFLT stack is 16 byte aligned xtensa: fix boot parameters address translation clk: s2mps11: Fix matching when built as module and DT node contains compatible clk: at91: Fix division by zero in PLL recalc_rate() clk: rockchip: Fix static checker warning in rockchip_ddrclk_get_parent call libceph: bump CEPH_MSG_MAX_DATA_LEN Revert "ceph: fix dentry leak in splice_dentry()" mach64: fix display corruption on big endian machines mach64: fix image corruption due to reading accelerator registers reset: hisilicon: fix potential NULL pointer dereference vhost/scsi: truncate T10 PI iov_iter to prot_bytes ocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry mm: thp: relax __GFP_THISNODE for MADV_HUGEPAGE mappings netfilter: conntrack: fix calculation of next bucket number in early_drop mtd: docg3: don't set conflicting BCH_CONST_PARAMS option of, numa: Validate some distance map rules termios, tty/tty_baudrate.c: fix buffer overrun arch/alpha, termios: implement BOTHER, IBSHIFT and termios2 Btrfs: fix cur_offset in the error case for nocow Btrfs: fix data corruption due to cloning of eof block clockevents/drivers/i8253: Add support for PIT shutdown quirk ext4: add missing brelse() update_backups()'s error path ext4: add missing brelse() in set_flexbg_block_bitmap()'s error path ext4: add missing brelse() add_new_gdb_meta_bg()'s error path ext4: avoid potential extra brelse in setup_new_flex_group_blocks() ext4: fix possible inode leak in the retry loop of ext4_resize_fs() ext4: avoid buffer leak in ext4_orphan_add() after prior errors ext4: fix missing cleanup if ext4_alloc_flex_bg_array() fails while resizing ext4: avoid possible double brelse() in add_new_gdb() on error path ext4: fix possible leak of sbi->s_group_desc_leak in error path ext4: fix possible leak of s_journal_flag_rwsem in error path ext4: release bs.bh before re-using in ext4_xattr_block_find() ext4: fix buffer leak in ext4_xattr_move_to_block() on error path ext4: fix buffer leak in __ext4_read_dirblock() on error path mount: Retest MNT_LOCKED in do_umount mount: Don't allow copying MNT_UNBINDABLE|MNT_LOCKED mounts mount: Prevent MNT_DETACH from disconnecting locked mounts sunrpc: correct the computation for page_ptr when truncating nfsd: COPY and CLONE operations require the saved filehandle to be set rtc: hctosys: Add missing range error reporting fuse: fix use-after-free in fuse_direct_IO() fuse: fix leaked notify reply configfs: replace strncpy with memcpy lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn hugetlbfs: fix kernel BUG at fs/hugetlbfs/inode.c:444! mm: migration: fix migration of huge PMD shared pages drm/rockchip: Allow driver to be shutdown on reboot/kexec drm/dp_mst: Check if primary mstb is null drm/i915/hdmi: Add HDMI 2.0 audio clock recovery N values drm/i915/execlists: Force write serialisation into context image vs execution KVM: arm64: Fix caching of host MDCR_EL2 value Linux 4.9.138 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* RTC subsystem, initialize system time on startup
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*
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* Copyright (C) 2005 Tower Technologies
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* Author: Alessandro Zummo <a.zummo@towertech.it>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/rtc.h>
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/* IMPORTANT: the RTC only stores whole seconds. It is arbitrary
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* whether it stores the most close value or the value with partial
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* seconds truncated. However, it is important that we use it to store
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* the truncated value. This is because otherwise it is necessary,
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* in an rtc sync function, to read both xtime.tv_sec and
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* xtime.tv_nsec. On some processors (i.e. ARM), an atomic read
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* of >32bits is not possible. So storing the most close value would
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* slow down the sync API. So here we have the truncated value and
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* the best guess is to add 0.5s.
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*/
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static int __init rtc_hctosys(void)
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{
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int err = -ENODEV;
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struct rtc_time tm;
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struct timespec64 tv64 = {
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.tv_nsec = NSEC_PER_SEC >> 1,
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};
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struct rtc_device *rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE);
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if (rtc == NULL) {
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pr_info("unable to open rtc device (%s)\n",
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CONFIG_RTC_HCTOSYS_DEVICE);
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goto err_open;
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}
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err = rtc_read_time(rtc, &tm);
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if (err) {
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dev_err(rtc->dev.parent,
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"hctosys: unable to read the hardware clock\n");
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goto err_read;
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}
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tv64.tv_sec = rtc_tm_to_time64(&tm);
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#if BITS_PER_LONG == 32
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if (tv64.tv_sec > INT_MAX) {
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err = -ERANGE;
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goto err_read;
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}
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#endif
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err = do_settimeofday64(&tv64);
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dev_info(rtc->dev.parent,
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"setting system clock to "
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"%d-%02d-%02d %02d:%02d:%02d UTC (%lld)\n",
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tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
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tm.tm_hour, tm.tm_min, tm.tm_sec,
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(long long) tv64.tv_sec);
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err_read:
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rtc_class_close(rtc);
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err_open:
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rtc_hctosys_ret = err;
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return err;
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}
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late_initcall(rtc_hctosys);
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