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authorMark Brown <broonie@kernel.org>2019-06-10 18:52:53 +0100
committerMark Brown <broonie@kernel.org>2019-06-10 18:52:53 +0100
commit4343f61103cdb8ccd6f3d5dd7168f1176a1cee37 (patch)
tree3db0a2e099cf7feb0c2d60d2a4bf1bf10d5253db /arch/arm64/include/asm/assembler.h
parentaef9752274f4045b0dab577e113da63c96832f77 (diff)
parentd1fdb6d8f6a4109a4263176c84b899076a5f8008 (diff)
Merge tag 'v5.2-rc4' into spi-5.3
Linux 5.2-rc4
Diffstat (limited to 'arch/arm64/include/asm/assembler.h')
-rw-r--r--arch/arm64/include/asm/assembler.h11
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 039fbd822ec6..92b6b7cf67dd 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -718,12 +718,11 @@ USER(\label, ic ivau, \tmp2) // invalidate I line PoU
* the output section, any use of such directives is undefined.
*
* The yield itself consists of the following:
- * - Check whether the preempt count is exactly 1, in which case disabling
- * preemption once will make the task preemptible. If this is not the case,
- * yielding is pointless.
- * - Check whether TIF_NEED_RESCHED is set, and if so, disable and re-enable
- * kernel mode NEON (which will trigger a reschedule), and branch to the
- * yield fixup code.
+ * - Check whether the preempt count is exactly 1 and a reschedule is also
+ * needed. If so, calling of preempt_enable() in kernel_neon_end() will
+ * trigger a reschedule. If it is not the case, yielding is pointless.
+ * - Disable and re-enable kernel mode NEON, and branch to the yield fixup
+ * code.
*
* This macro sequence may clobber all CPU state that is not guaranteed by the
* AAPCS to be preserved across an ordinary function call.