diff options
| author | Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2015-05-21 09:43:04 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-06-07 12:29:15 +0300 |
| commit | d3cb06e0cdc9841b289a0d68acaffd2868504902 (patch) | |
| tree | 3709e190a18c5c1c55fb609a1698ea291337a115 /arch/powerpc/include | |
| parent | 1db365258ad9c3624897f48c764f8c557f492b26 (diff) | |
| download | linux-d3cb06e0cdc9841b289a0d68acaffd2868504902.tar.xz | |
powerpc/dscr: Add some in-code documentation
This patch adds some in-code documentation to the DSCR related code to
make it more readable without having any functional change to it.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index bf117d8fb45f..28ded5d9b579 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -295,6 +295,15 @@ struct thread_struct { #endif #ifdef CONFIG_PPC64 unsigned long dscr; + /* + * This member element dscr_inherit indicates that the process + * has explicitly attempted and changed the DSCR register value + * for itself. Hence kernel wont use the default CPU DSCR value + * contained in the PACA structure anymore during process context + * switch. Once this variable is set, this behaviour will also be + * inherited to all the children of this process from that point + * onwards. + */ int dscr_inherit; unsigned long ppr; /* used to save/restore SMT priority */ #endif |