5.15-stable review patch. If anyone has any objections, please let me know.
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From: Alexander Shiyan eagle.alexander923@gmail.com
[ Upstream commit 62d48983f215bf1dd48665913318101fa3414dcf ]
This patch adds a small optimization to the low-level at91_reset() function, which includes: - Removes the extra branch, since the following store operations already have proper condition checks. - Removes the definition of the clobber register r4, since it is no longer used in the code.
Fixes: fcd0532fac2a ("power: reset: at91-reset: make at91sam9g45_restart() generic") Signed-off-by: Alexander Shiyan eagle.alexander923@gmail.com Reviewed-by: Alexandre Belloni alexandre.belloni@bootlin.com Link: https://lore.kernel.org/r/20250307053809.20245-1-eagle.alexander923@gmail.co... Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/power/reset/at91-reset.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c index 64def79d557a8..e6743a3d7877a 100644 --- a/drivers/power/reset/at91-reset.c +++ b/drivers/power/reset/at91-reset.c @@ -81,12 +81,11 @@ static int at91_reset(struct notifier_block *this, unsigned long mode, " str %4, [%0, %6]\n\t" /* Disable SDRAM1 accesses */ "1: tst %1, #0\n\t" - " beq 2f\n\t" " strne %3, [%1, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t" /* Power down SDRAM1 */ " strne %4, [%1, %6]\n\t" /* Reset CPU */ - "2: str %5, [%2, #" __stringify(AT91_RSTC_CR) "]\n\t" + " str %5, [%2, #" __stringify(AT91_RSTC_CR) "]\n\t"
" b .\n\t" : @@ -97,7 +96,7 @@ static int at91_reset(struct notifier_block *this, unsigned long mode, "r" cpu_to_le32(AT91_DDRSDRC_LPCB_POWER_DOWN), "r" (reset->args), "r" (reset->ramc_lpr) - : "r4"); + );
return NOTIFY_DONE; }