linux-kernel - [PATCH 4.18 029/350] parisc: Fix exported address of os

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Date:   Sun, 11 Nov 2018 14:18:13 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Helge Deller <deller@....de>
Subject: [PATCH 4.18 029/350] parisc: Fix exported address of os_hpmc handler

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Helge Deller <deller@....de>

commit 99a3ae51d557d8e38a7aece65678a31f9db215ee upstream.

In the C-code we need to put the physical address of the hpmc handler in
the interrupt vector table (IVA) in order to get HPMCs working.  Since
on parisc64 function pointers are indirect (in fact they are function
descriptors) we instead export the address as variable and not as
function.

This reverts a small part of commit f39cce654f9a ("parisc: Add
cfi_startproc and cfi_endproc to assembly code").

Signed-off-by: Helge Deller <deller@....de>
Cc: <stable@...r.kernel.org>    [4.9+]
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/parisc/kernel/hpmc.S |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/parisc/kernel/hpmc.S
+++ b/arch/parisc/kernel/hpmc.S
@@ -85,7 +85,7 @@ END(hpmc_pim_data)

 	.import intr_save, code
 	.align 16
-ENTRY_CFI(os_hpmc)
+ENTRY(os_hpmc)
 .os_hpmc:

 	/*
@@ -302,7 +302,6 @@ os_hpmc_6:
 	b .
 	nop
 	.align 16	/* make function length multiple of 16 bytes */
-ENDPROC_CFI(os_hpmc)
 .os_hpmc_end: