2005-04-17 06:20:36 +08:00
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config H8300
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bool
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default y
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2008-02-09 17:46:40 +08:00
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select HAVE_IDE
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2011-01-19 19:26:32 +08:00
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select HAVE_GENERIC_HARDIRQS
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2012-12-19 06:21:29 +08:00
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select GENERIC_ATOMIC64
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2012-10-09 07:28:08 +08:00
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select HAVE_UID16
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2013-03-07 12:48:16 +08:00
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select VIRT_TO_BUS
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2012-07-31 05:42:46 +08:00
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select ARCH_WANT_IPC_PARSE_VERSION
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2011-03-25 02:15:36 +08:00
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select GENERIC_IRQ_SHOW
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2012-01-10 11:04:32 +08:00
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select GENERIC_CPU_DEVICES
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2012-09-28 13:01:03 +08:00
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select MODULES_USE_ELF_RELA
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2012-12-26 05:27:07 +08:00
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select OLD_SIGSUSPEND3
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2012-12-26 08:29:41 +08:00
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select OLD_SIGACTION
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2013-03-15 12:34:17 +08:00
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select HAVE_UNDERSCORE_SYMBOL_PREFIX
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2009-11-08 05:03:54 +08:00
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2005-04-17 06:20:36 +08:00
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config MMU
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bool
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default n
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config SWAP
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bool
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default n
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2007-02-10 17:43:09 +08:00
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config ZONE_DMA
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bool
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default y
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2005-04-17 06:20:36 +08:00
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config FPU
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bool
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default n
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config RWSEM_GENERIC_SPINLOCK
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bool
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default y
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config RWSEM_XCHGADD_ALGORITHM
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bool
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default n
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2006-12-08 18:37:49 +08:00
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config ARCH_HAS_ILOG2_U32
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bool
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default n
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config ARCH_HAS_ILOG2_U64
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bool
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default n
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[PATCH] bitops: h8300: use generic bitops
- remove generic_ffs()
- remove find_{next,first}{,_zero}_bit()
- remove sched_find_first_bit()
- remove generic_hweight{32,16,8}()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
- remove ext2_{set,clear}_bit_atomic()
- remove minix_{test,set,test_and_clear,test,find_first_zero}_bit()
- remove generic_fls()
- remove generic_fls64()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 17:39:23 +08:00
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config GENERIC_HWEIGHT
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2007-05-07 05:50:35 +08:00
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bool
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default y
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|
2005-04-17 06:20:36 +08:00
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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|
2008-10-16 13:01:17 +08:00
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config GENERIC_BUG
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bool
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depends on BUG
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|
2006-02-15 05:53:15 +08:00
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config TIME_LOW_RES
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bool
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default y
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2007-02-11 23:41:31 +08:00
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config NO_IOPORT
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def_bool y
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|
2007-07-16 14:40:26 +08:00
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config NO_DMA
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def_bool y
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|
2005-04-17 06:20:36 +08:00
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config ISA
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bool
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default y
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config PCI
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bool
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default n
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|
avoid overflows in kernel/time.c
When the conversion factor between jiffies and milli- or microseconds is
not a single multiply or divide, as for the case of HZ == 300, we currently
do a multiply followed by a divide. The intervening result, however, is
subject to overflows, especially since the fraction is not simplified (for
HZ == 300, we multiply by 300 and divide by 1000).
This is exposed to the user when passing a large timeout to poll(), for
example.
This patch replaces the multiply-divide with a reciprocal multiplication on
32-bit platforms. When the input is an unsigned long, there is no portable
way to do this on 64-bit platforms there is no portable way to do this
since it requires a 128-bit intermediate result (which gcc does support on
64-bit platforms but may generate libgcc calls, e.g. on 64-bit s390), but
since the output is a 32-bit integer in the cases affected, just simplify
the multiply-divide (*3/10 instead of *300/1000).
The reciprocal multiply used can have off-by-one errors in the upper half
of the valid output range. This could be avoided at the expense of having
to deal with a potential 65-bit intermediate result. Since the intent is
to avoid overflow problems and most of the other time conversions are only
semiexact, the off-by-one errors were considered an acceptable tradeoff.
At Ralf Baechle's suggestion, this version uses a Perl script to compute
the necessary constants. We already have dependencies on Perl for kernel
compiles. This does, however, require the Perl module Math::BigInt, which
is included in the standard Perl distribution starting with version 5.8.0.
In order to support older versions of Perl, include a table of canned
constants in the script itself, and structure the script so that
Math::BigInt isn't required if pulling values from said table.
Running the script requires that the HZ value is available from the
Makefile. Thus, this patch also adds the Kconfig variable CONFIG_HZ to the
architectures which didn't already have it (alpha, cris, frv, h8300, m32r,
m68k, m68knommu, sparc, v850, and xtensa.) It does *not* touch the sh or
sh64 architectures, since Paul Mundt has dealt with those separately in the
sh tree.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Ralf Baechle <ralf@linux-mips.org>,
Cc: Sam Ravnborg <sam@ravnborg.org>,
Cc: Paul Mundt <lethal@linux-sh.org>,
Cc: Richard Henderson <rth@twiddle.net>,
Cc: Michael Starvik <starvik@axis.com>,
Cc: David Howells <dhowells@redhat.com>,
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>,
Cc: Hirokazu Takata <takata@linux-m32r.org>,
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
Cc: Roman Zippel <zippel@linux-m68k.org>,
Cc: William L. Irwin <sparclinux@vger.kernel.org>,
Cc: Chris Zankel <chris@zankel.net>,
Cc: H. Peter Anvin <hpa@zytor.com>,
Cc: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-08 20:21:26 +08:00
|
|
|
config HZ
|
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|
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int
|
|
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|
|
default 100
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
source "init/Kconfig"
|
|
|
|
|
|
2008-10-19 11:27:21 +08:00
|
|
|
source "kernel/Kconfig.freezer"
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
source "arch/h8300/Kconfig.cpu"
|
|
|
|
|
|
|
|
|
|
menu "Executable file formats"
|
|
|
|
|
|
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
|
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|
|
|
endmenu
|
|
|
|
|
|
2005-07-12 12:03:49 +08:00
|
|
|
source "net/Kconfig"
|
|
|
|
|
|
2013-05-17 00:42:12 +08:00
|
|
|
source "drivers/Kconfig"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
source "arch/h8300/Kconfig.ide"
|
|
|
|
|
|
|
|
|
|
source "fs/Kconfig"
|
|
|
|
|
|
|
|
|
|
source "arch/h8300/Kconfig.debug"
|
|
|
|
|
|
|
|
|
|
source "security/Kconfig"
|
|
|
|
|
|
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
|
|
|
|
|
|
source "lib/Kconfig"
|