Bug 15668

Summary: start_kernel(): bug: interrupts were enabled early
Product: Platform Specific/Hardware Reporter: Maciej Rutecki (maciej.rutecki)
Component: ARMAssignee: linux-arm-kernel (linux-arm-kernel)
Status: CLOSED CODE_FIX    
Severity: normal CC: hpa, khilman, maciej.rutecki, rabin, rjw, yinghai
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.34-rc Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 15310    

Description Maciej Rutecki 2010-04-01 16:31:15 UTC 
Subject    : start_kernel(): bug: interrupts were enabled early
Submitter  : Rabin Vincent <rabin@rab.in>
Date       : 2010-03-25 19:53
Message-ID : 20100325194100.GA2364@debian
References : http://marc.info/?l=linux-kernel&m=126954607216519&w=2

This entry is being used for tracking a regression from 2.6.33.  Please don't
close it until the problem is fixed in the mainline.

Caused by:

commit 773e3eb7b81e5ba13b5155dfb3bb75b8ce37f8f9
  Author: Yinghai Lu <yinghai@kernel.org>
  Date:   Wed Feb 10 01:20:33 2010 -0800

      init: Move radix_tree_init() early

      Prepare for using radix trees in early_irq_init().

      Signed-off-by: Yinghai Lu <yinghai@kernel.org>
      LKML-Reference: <1265793639-15071-30-git-send-email-yinghai@kernel.org>
      Signed-off-by: H. Peter Anvin <hpa@zytor.com>

First-Bad-Commit : 773e3eb7b81e5ba13b5155dfb3bb75b8ce37f8f9
Comment 1 Kevin Hilman 2010-04-07 23:17:48 UTC 
Proposed patch on LKML: http://lkml.org/lkml/2010/4/7/301

Tested on TI OMAP3 platform (ARM Cortex A8)
Comment 2 Rafael J. Wysocki 2010-04-21 04:59:36 UTC 
On Tuesday 20 April 2010, Rabin Vincent wrote:
> On Tue, Apr 20, 2010 at 05:19:21AM +0200, Rafael J. Wysocki wrote:
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=15668
> > Subject             : start_kernel(): bug: interrupts were enabled early
> > Submitter   : Rabin Vincent <rabin@rab.in>
> > Date                : 2010-03-25 19:53 (26 days old)
> > First-Bad-Commit:
> http://kernel.org/git/linus/773e3eb7b81e5ba13b5155dfb3bb75b8ce37f8f9
> > Message-ID  : <20100325194100.GA2364@debian>
> > References  : http://marc.info/?l=linux-kernel&m=126954607216519&w=2
> 
> This was fixed by 3eac4abaa69949af0e2f64e5c55ee8a22bbdd3e7 ("rwsem
> generic spinlock: use IRQ save/restore spinlocks").