ARM: 7425/1: extable: ensure fixup entries are 4-byte aligned

Fixup entries in the kernel exception tables should be 4-byte aligned
since we return directly to them when handling a faulting instruction in
the kernel.

This patch adds the missing align directives to the fixup entries.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/include/asm/futex.h b/arch/arm/include/asm/futex.h
index 7be54690aeec0f38be6bb2738a8a7df8a243021d..e42cf597f6e6b5b7bcad58cdf9e75289d66672d4 100644 (file)
--- a/arch/arm/include/asm/futex.h
+++ b/arch/arm/include/asm/futex.h
@@ -19,6 +19,7 @@
        "       .long   1b, 4f, 2b, 4f\n"                       \
        "       .popsection\n"                                  \
        "       .pushsection .fixup,\"ax\"\n"                   \
+       "       .align  2\n"                                    \
        "4:     mov     %0, " err_reg "\n"                      \
        "       b       3b\n"                                   \
        "       .popsection"

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 437f0c426517cf39c1035c3e7a0b6cfecb9395cb..0d1851ca6eb993a628f623c257487200fe529604 100644 (file)
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -495,6 +495,7 @@ ENDPROC(__und_usr)
  * The out of line fixup for the ldrt above.
  */
        .pushsection .fixup, "ax"
+       .align  2
 4:     mov     pc, r9
        .popsection
        .pushsection __ex_table,"a"