From: Helge Deller <deller@gmx.de>
Date: Mon, 9 Mar 2026 14:16:37 +0000 (+0100)
Subject: parisc: Flush correct cache in cacheflush() syscall
X-Git-Tag: v7.0-rc5~29^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c98a8fbd6aa647414c6248dacf254ebe91c79ad;p=thirdparty%2Flinux.git

parisc: Flush correct cache in cacheflush() syscall

The assembly flush instructions were swapped for I- and D-cache flags:

SYSCALL_DEFINE3(cacheflush, ...)
{
	if (cache & DCACHE) {
			"fic ...\n"
	}
	if (cache & ICACHE && error == 0) {
			"fdc ...\n"
	}

Fix it by using fdc for DCACHE, and fic for ICACHE flushing.

Reported-by: Felix Lechner <felix.lechner@lease-up.com>
Fixes: c6d96328fecd ("parisc: Add cacheflush() syscall")
Cc: <stable@vger.kernel.org> # v6.5+
Signed-off-by: Helge Deller <deller@gmx.de>
---

diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 4c5240d3a3c7..b189265785dc 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -953,7 +953,7 @@ SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes,
 #else
 			"1: cmpb,<<,n	%0,%2,1b\n"
 #endif
-			"   fic,m	%3(%4,%0)\n"
+			"   fdc,m	%3(%4,%0)\n"
 			"2: sync\n"
 			ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 2b, "%1")
 			: "+r" (start), "+r" (error)
@@ -968,7 +968,7 @@ SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, bytes,
 #else
 			"1: cmpb,<<,n	%0,%2,1b\n"
 #endif
-			"   fdc,m	%3(%4,%0)\n"
+			"   fic,m	%3(%4,%0)\n"
 			"2: sync\n"
 			ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 2b, "%1")
 			: "+r" (start), "+r" (error)