From: Andrew Morton <akpm@osdl.org>
To: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: torvalds@osdl.org, linux-kernel@vger.kernel.org, jun.nakajima@intel.com
Subject: Re: [PATCHSET][2.6-test4][0/6]Support for HPET based timer - Take 2
Date: Fri, 29 Aug 2003 11:23:47 -0700 [thread overview]
Message-ID: <20030829112347.2d8e292d.akpm@osdl.org> (raw)
In-Reply-To: <C8C38546F90ABF408A5961FC01FDBF1902C7D211@fmsmsx405.fm.intel.com>
"Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> wrote:
>
> Resending the patch.
Thanks, I'll include these in the next -mm kernel.
Reading the code, the only thing which leaps out is:
+/* Use our own asm for 64 bit multiply/divide */
+#define ASM_MUL64_REG(eax_out,edx_out,reg_in,eax_in) \
+ __asm__ __volatile__("mull %2" \
+ :"=a" (eax_out), "=d" (edx_out) \
+ :"r" (reg_in), "0" (eax_in))
+
+#define ASM_DIV64_REG(eax_out,edx_out,reg_in,eax_in,edx_in) \
+ __asm__ __volatile__("divl %2" \
+ :"=a" (eax_out), "=d" (edx_out) \
+ :"r" (reg_in), "0" (eax_in), "1" (edx_in))
We seem to keep on proliferating home-grown x86 64-bit math functions.
Do you really need these? Is it possible to use do_div() and the C 64x64
`*' operator instead?
I'd like the rtc emulation patch to be redone to remove the ifdefs please,
they're a real eyesore.
At the top of rtc.c, do something like this:
#ifndef CONFIG_HPET_EMULATE_RTC
#define is_hpet_enabled() 0
#define hpet_set_alarm_time(hrs, min, sec) 0
#define hpet_set_periodic_freq(arg) 0
static inline int hpet_mask_rtc_irq_bit(int arg) { return 0; }
#define hpet_rtc_timer_init() do { } while (0)
#define hpet_rtc_dropped_irq() 0
#endif
And then all those eleven ifdefs can be removed from rtc.c.
Thanks.
next prev parent reply other threads:[~2003-08-29 18:40 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-28 23:41 [PATCHSET][2.6-test4][0/6]Support for HPET based timer - Take 2 Pallipadi, Venkatesh
2003-08-29 18:23 ` Andrew Morton [this message]
2003-08-29 21:03 ` Erik Andersen
2003-08-31 21:05 ` Linus Torvalds
2003-08-31 22:24 ` Erik Andersen
2003-08-31 22:48 ` Linus Torvalds
2003-09-05 22:19 ` George Anzinger
[not found] <pEGJ.73p.5@gated-at.bofh.it>
2003-08-29 3:40 ` David Mosberger-Tang
2003-08-29 16:12 Pallipadi, Venkatesh
2003-08-30 4:59 ` David Mosberger-Tang
2003-08-29 23:58 Pallipadi, Venkatesh
2003-09-05 22:26 ` George Anzinger
2003-08-30 16:26 Pallipadi, Venkatesh
2003-09-06 19:04 Pallipadi, Venkatesh
2003-09-07 17:57 ` George Anzinger
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