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esp32c3_irq.c: Add a comment explaining the assigment of CURRENT_REGS to

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regs.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
This commit is contained in:
Abdelatif Guettouche 2022-01-21 14:16:21 +01:00 committed by Xiang Xiao
parent e335d44028
commit 8c582c27b8
1 changed files with 6 additions and 0 deletions
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6
arch/risc-v/src/esp32c3/esp32c3_irq.c
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@ -438,6 +438,12 @@ IRAM_ATTR uintptr_t *esp32c3_dispatch_irq(uintptr_t mcause, uintptr_t *regs)
}
}
/* If a context switch occurred while processing the interrupt then
* CURRENT_REGS may have change value. If we return any value different
* from the input regs, then the lower level will know that a context
* switch occurred during interrupt processing.
*/
regs = (uintptr_t *)CURRENT_REGS;
CURRENT_REGS = NULL;