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EXCEPTION_PROLOG_0 and EXCEPTION_EPILOG_0 were added some time ago in order to regroup the two mtspr/mfspr to SCRATCH0 and SCRATCH1 and the mfcr/mtcr in order to ease entry and exit of function not using the full EXCEPTION_PROLOG. Since then, the mfcr/mtcr has been taken out, hence just leaving the two mtspr/mfspr in the macro. In order to improve readability of the exception functions, we remove those two macros and copy back the two mtspr/mfspr instead. As r10 and r11 are used for SCRATCH0 and SCRATCH1, lets also use r12 for SCRATCH2. It will also improve the readability/maintenance. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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| firmware | ||
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| kernel | ||
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.