Difference between revisions of "Kernel 3.4 to 3.10 porting guide"

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Here are some issues you may run into when porting something from 3.4 to 3.10:
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'''Here are some issues you may run into when porting something from 3.4 to 3.10:'''
  
* __devexit is no longer used (or defined)
 
** background: __devexit was an attribute used on certain driver routines.  It was removed between 3.4 and 3.10, and should no longer be used
 
** just remove the attribute from any functions it is used with
 
 
----
 
----
* __devinitdata is no longer used (or defined)
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* a whole set of __dev... macros are no longer used or defined
** background: __devinitdata was an attribute used on certain data declarations.  It was removed between 3.4 and 3.10 and should not longer be used
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** Here is the list: __devinit, __devinitdata, __devinitconst, __devexit, __devexitdata, __devexitconst
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** background: These attributes were used on certain driver functions and data declarations, putting them in a separate section that could be discarded under certain circumstancesThis functionality is no longer relevant, and the macros were removed in version 3.8 of the kernel. The macros should no longer be used.
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** Just remove the attributes any place they are used.
 
** see this commit: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54b956b903607
 
** see this commit: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54b956b903607
** just remove the attribute from any declarations is it used with
 
 
----
 
----
 
* sysdev.h is gone, along with all it declared:
 
* sysdev.h is gone, along with all it declared:
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* arch/arm/include/asm/hardware/gic.h was moved to include/linux/irqchip/arm-gic.h
 
* arch/arm/include/asm/hardware/gic.h was moved to include/linux/irqchip/arm-gic.h
 
** change #include <asm/hardware/gic.h> to #include <linux/irqchip/arm-gic.h>
 
** change #include <asm/hardware/gic.h> to #include <linux/irqchip/arm-gic.h>
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----
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* Remove MSM_ prefix from SSBI drivers
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** impacts config options, file names, function names, types, etc
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** Files are in drivers/, drivers/mfd/, drivers/ssbi/, include/linux/
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*** s/msm_ssbi_/ssbi_/g
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*** s/MSM_SSBI_/SSBI_/g
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** see this commmit: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce44bf5b5544c

Latest revision as of 22:50, 15 July 2013

Here are some issues you may run into when porting something from 3.4 to 3.10:


  • a whole set of __dev... macros are no longer used or defined
    • Here is the list: __devinit, __devinitdata, __devinitconst, __devexit, __devexitdata, __devexitconst
    • background: These attributes were used on certain driver functions and data declarations, putting them in a separate section that could be discarded under certain circumstances. This functionality is no longer relevant, and the macros were removed in version 3.8 of the kernel. The macros should no longer be used.
    • Just remove the attributes any place they are used.
    • see this commit: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54b956b903607

  • sysdev.h is gone, along with all it declared:
    • struct sys_device, struct sysdev_attribute

  • arch/arm/include/asm/hardware/gic.h was moved to include/linux/irqchip/arm-gic.h
    • change #include <asm/hardware/gic.h> to #include <linux/irqchip/arm-gic.h>