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No architecture uses the genrtc driver any more, so let's kill it off
for good. This now also includes asm-generic/rtc.h, which is otherwise
completely unused.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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Drivers should not really include stuff from asm-generic directly,
and the PC-style cmos rtc driver does this in order to reuse the
mc146818 implementation of get_rtc_time/set_rtc_time rather than
the architecture specific one for the architecture it gets built for.
To make it more obvious what is going on, this moves and renames the
two functions into include/linux/mc146818rtc.h, which holds the
other mc146818 specific code. Ideally it would be in a .c file,
but that would require extra infrastructure as the functions are
called by multiple drivers with conflicting dependencies.
With this change, the asm-generic/rtc.h header also becomes much
more generic, so it can be reused more easily across any architecture
that still relies on the genrtc driver.
The only caller of the internal __get_rtc_time/__set_rtc_time
functions is in arch/alpha/kernel/rtc.c, and we just change those
over to the new naming.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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If century field is supported by the RTC CMOS device, then we should use
it and then do not consider years greater that 169 as an error.
For information, the year field of the rtc_time structure contains the
value to add to 1970 to obtain the current year.
This was a hack to be able to support years for 1970 to 2069.
This patch remains compatible with this implementation.
Signed-off-by: Sylvain Chouleur <sylvain.chouleur@intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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Evidently, set_rtc_time is supposed to be overridable
by architectures that define their own version, but
unfortunately, get_rtc_ss would in that case still
use the generic version.
This makes get_rtc_ss call the real set_rtc_time
to let architectures define their own version.
The change should fix the "Extended RTC operation"
on Alpha, which uses the incorrect get_rtc_ss
call. It also allows PowerPC to use the asm-generic/rtc.h
file in the future.
Cc: Richard Henderson <rth@twiddle.net>
Cc: linux-alpha@vger.kernel.org
Cc: Tom Rini <trini@mvista.com>
Cc: rtc-linux@googlegroups.com
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Unlike other alphas, marvel doesn't have real PC-style CMOS clock hardware
- RTC accesses are emulated via PAL calls. Unfortunately, for unknown
reason these calls work only on CPU #0. So current implementation for
arbitrary CPU makes CMOS_READ/WRITE to be executed on CPU #0 via IPI.
However, for obvious reason this doesn't work with standard
get/set_rtc_time() functions, where a bunch of CMOS accesses is done with
disabled interrupts.
Solved by making the IPI calls for entire get/set_rtc_time() functions,
not for individual CMOS accesses. Which is also a lot more effective
performance-wise.
The patch is largely based on the code from Jay Estabrook.
My changes:
- tweak asm-generic/rtc.h by adding a couple of #defines to
avoid a massive code duplication in arch/alpha/include/asm/rtc.h;
- sys_marvel.c: fix get/set_rtc_time() return values (Jay's FIXMEs).
NOTE: this fixes *only* LIB_RTC drivers. Legacy (CONFIG_RTC) driver
wont't work on marvel. Actually I think that we should just disable
CONFIG_RTC on alpha (maybe in 2.6.30?), like most other arches - AFAIK,
all modern distributions use LIB_RTC anyway.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Change various rtc related code to use the new bcd2bin/bin2bcd functions
instead of the obsolete BCD_TO_BIN/BIN_TO_BCD/BCD2BIN/BIN2BCD macros.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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if get_rtc_time() is _ever_ called with IRQs off, we deadlock badly
in it, waiting for jiffies to increment.
So make the code more robust by doing an explicit mdelay(20).
This solves a very hard to reproduce/debug hard lockup reported
by Mikael Pettersson.
Reported-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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After disabling both CONFIG_DEBUG_LOCKING_API_SELFTESTS and netconsole
(using current mainline) I get a login prompt, and also...
[ 5.181668] SELinux: policy loaded with handle_unknown=deny
[ 5.183315] type=1403 audit(1202100038.157:3): policy loaded auid=4294967295 ses=4294967295
[ 5.822073] SELinux: initialized (dev usbfs, type usbfs), uses genfs_contexts
[ 7.819146] ------------[ cut here ]------------
[ 7.819146] WARNING: at kernel/lockdep.c:2033 trace_hardirqs_on+0x9b/0x10d()
[ 7.819146] Modules linked in: generic ext3 jbd ide_disk ide_core
[ 7.819146] Pid: 399, comm: hwclock Not tainted 2.6.24 #4
[ 7.819146] [<c011d140>] warn_on_slowpath+0x41/0x51
[ 7.819146] [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[ 7.819146] [<c013770c>] ? check_usage_forwards+0x19/0x3b
[ 7.819146] [<c01390c4>] ? __lock_acquire+0xac3/0xb0b
[ 7.819146] [<c0108c98>] ? native_sched_clock+0x8b/0x9f
[ 7.819146] [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[ 7.819146] [<c030ca6c>] ? _spin_unlock_irq+0x22/0x42
[ 7.819146] [<c013848b>] trace_hardirqs_on+0x9b/0x10d
[ 7.819146] [<c030ca6c>] _spin_unlock_irq+0x22/0x42
[ 7.819146] [<c011481e>] hpet_rtc_interrupt+0xdf/0x290
[ 7.819146] [<c014ea90>] handle_IRQ_event+0x1a/0x46
[ 7.819146] [<c014f8ea>] handle_edge_irq+0xbe/0xff
[ 7.819146] [<c0106e08>] do_IRQ+0x6d/0x84
[ 7.819146] [<c0105596>] common_interrupt+0x2e/0x34
[ 7.819146] [<c013007b>] ? ktime_get_ts+0x8/0x3f
[ 7.819146] [<c0139420>] ? lock_release+0x167/0x16f
[ 7.819146] [<c017974a>] ? core_sys_select+0x2c/0x327
[ 7.819146] [<c0179792>] core_sys_select+0x74/0x327
[ 7.819146] [<c0108c98>] ? native_sched_clock+0x8b/0x9f
[ 7.819146] [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[ 7.819146] [<c030ca6c>] ? _spin_unlock_irq+0x22/0x42
[ 7.819146] [<c01384d6>] ? trace_hardirqs_on+0xe6/0x10d
[ 7.819146] [<c030ca77>] ? _spin_unlock_irq+0x2d/0x42
[ 7.819146] [<c023b437>] ? rtc_do_ioctl+0x11b/0x677
[ 7.819146] [<c01c487e>] ? inode_has_perm+0x5e/0x68
[ 7.819146] [<c01364a9>] ? lock_release_holdtime+0x50/0x56
[ 7.819146] [<c0108c98>] ? native_sched_clock+0x8b/0x9f
[ 7.819146] [<c01c490b>] ? file_has_perm+0x83/0x8c
[ 7.819146] [<c023ba08>] ? rtc_ioctl+0xf/0x11
[ 7.819146] [<c017898d>] ? do_ioctl+0x55/0x67
[ 7.819146] [<c0179d15>] sys_select+0x93/0x163
[ 7.819146] [<c0104b39>] ? sysenter_past_esp+0x9a/0xa5
[ 7.819146] [<c0104afe>] sysenter_past_esp+0x5f/0xa5
[ 7.819146] =======================
[ 7.819146] ---[ end trace 96540ca301ffb84c ]---
[ 7.819210] rtc: lost 6 interrupts
[ 7.870668] type=1400 audit(1202128840.794:4): avc: denied { audit_write } for pid=399 comm="hwclock" capability=29 scontext=system_u:system_r:hwclock_t:s0 tcontext=system_u:system_r:hwclock_t:s0 tclass=capability
[ 9.538866] input: PC Speaker as /class/input/input5
Because hpet_rtc_interrupt()'s call to get_rtc_time() ends up
resolving to include/asm-generic/rtc.h's (hilariously inlined)
get_rtc_time(), which does spin_unlock_irq() from hard IRQ context.
The obvious patch fixes it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Many files include the filename at the beginning, serveral used a wrong one.
Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
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Considering that there isn't a lot of hw we can depend on during resume,
this is about as good as it gets.
This is x86-only for now, although the basic concept (and most of the
code) will certainly work on almost any platform.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
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