Commit 2c98a8fb authored by Helge Deller's avatar Helge Deller
Browse files

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: default avatarFelix Lechner <felix.lechner@lease-up.com>
Fixes: c6d96328 ("parisc: Add cacheflush() syscall")
Cc: <stable@vger.kernel.org> # v6.5+
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 1f318b96

arch/parisc/kernel/cache.c

+2 −2
Original line number Diff line number Diff line
@@ -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)