linux-stable.git/arch/parisc, branch v5.3

parisc: fix compilation errrors

2019-08-25T02:48:42+00:00

Commit 0cfaee2af3a0 ("include/asm-generic/5level-fixup.h: fix variable
'p4d' set but not used") converted a few functions from macros to static
inline, which causes parisc to complain,

  In file included from include/asm-generic/4level-fixup.h:38:0,
                   from arch/parisc/include/asm/pgtable.h:5,
                   from arch/parisc/include/asm/io.h:6,
                   from include/linux/io.h:13,
                   from sound/core/memory.c:9:
  include/asm-generic/5level-fixup.h:14:18: error: unknown type name 'pgd_t'; did you mean 'pid_t'?
   #define p4d_t    pgd_t
                    ^
  include/asm-generic/5level-fixup.h:24:28: note: in expansion of macro 'p4d_t'
   static inline int p4d_none(p4d_t p4d)
                              ^~~~~

It is because "4level-fixup.h" is included before "asm/page.h" where
"pgd_t" is defined.

Link: http://lkml.kernel.org/r/20190815205305.1382-1-cai@lca.pw
Fixes: 0cfaee2af3a0 ("include/asm-generic/5level-fixup.h: fix variable 'p4d' set but not used")
Signed-off-by: Qian Cai 
Reported-by: Guenter Roeck 
Tested-by: Guenter Roeck 
Cc: Stephen Rothwell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Makefile: Convert -Wimplicit-fallthrough=3 to just -Wimplicit-fallthrough for clang

2019-08-10T19:45:37+00:00

A compilation -Wimplicit-fallthrough warning was enabled by commit
a035d552a93b ("Makefile: Globally enable fall-through warning")

Even though clang 10.0.0 does not currently support this warning without
a patch, clang currently does not support a value for this option.

  Link: https://bugs.llvm.org/show_bug.cgi?id=39382

The gcc default for this warning is 3 so removing the =3 has no effect
for gcc and enables the warning for patched versions of clang.

Also remove the =3 from an existing use in a parisc Makefile:
arch/parisc/math-emu/Makefile

Signed-off-by: Joe Perches 
Reviewed-and-tested-by: Nathan Chancellor 
Cc: Gustavo A. R. Silva 
Signed-off-by: Linus Torvalds

parisc: Add archclean Makefile target

2019-08-01T12:20:55+00:00

Apparently we don't have an archclean target in our
arch/parisc/Makefile, so files in there never get cleaned out by make
mrproper.  This, in turn means that the sizes.h file in
arch/parisc/boot/compressed never gets removed and worse, when you
transition to an O=build/parisc[64] build model it overrides the
generated file.  The upshot being my bzImage was building with a SZ_end
that was too small.

I fixed it by making mrproper clean everything.

Signed-off-by: James Bottomley 
Cc: stable@vger.kernel.org # v4.20+
Signed-off-by: Helge Deller

parisc: Strip debug info from kernel before creating compressed vmlinuz

2019-08-01T12:17:53+00:00

Same as on x86-64, strip the .comment, .note and debug sections from the
Linux kernel before creating the compressed image for the boot loader.

Reported-by: James Bottomley 
Reported-by: Sven Schnelle 
Cc: stable@vger.kernel.org # v4.20+
Signed-off-by: Helge Deller

parisc: Fix build of compressed kernel even with debug enabled

2019-08-01T12:17:53+00:00

With debug info enabled (CONFIG_DEBUG_INFO=y) the resulting vmlinux may get
that huge that we need to increase the start addresss for the decompression
text section otherwise one will face a linker error.

Reported-by: Sven Schnelle 
Tested-by: Sven Schnelle 
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Helge Deller

parisc: fix race condition in patching code

2019-07-31T14:20:57+00:00

Assume the following ftrace code sequence that was patched in earlier by
ftrace_make_call():

PAGE A:
ffc:	addr of ftrace_caller()
PAGE B:
000:	0x6fc10080 /* stw,ma r1,40(sp) */
004:	0x48213fd1 /* ldw -18(r1),r1 */
008:	0xe820c002 /* bv,n r0(r1) */
00c:	0xe83f1fdf /* b,l,n .-c,r1 */

When a Code sequences that is to be patched spans a page break, we might
have already cleared the part on the PAGE A. If an interrupt is coming in
during the remap of the fixed mapping to PAGE B, it might execute the
patched function with only parts of the FTRACE code cleared. To prevent
this, clear the jump to our mini trampoline first, and clear the remaining
parts after this. This might also happen when patch_text() patches a
function that it calls during remap.

Signed-off-by: Sven Schnelle 
Cc:  # 5.2+
Signed-off-by: Helge Deller

parisc: rename default_defconfig to defconfig

2019-07-31T14:18:18+00:00

'default_defconfig' is an awkward name since 'defconfig' is the default.
Let's simply say 'defconfig' like other architectures. You can drop the
KBUILD_DEFCONFIG define by following the standard naming.

Signed-off-by: Masahiro Yamada 
Signed-off-by: Helge Deller

parisc: Fix fall-through warnings in fpudispatch.c

2019-07-31T14:16:43+00:00

In fpudispatch.c we see a lot of fall-through warnings, but for this file we
prefer to not mark the switches and instead keep it in it's original state as
it's copied from HP-UX.

Fixes: a035d552a93b ("Makefile: Globally enable fall-through warning")
Signed-off-by: Helge Deller

parisc: Mark expected switch fall-throughs in fault.c

2019-07-31T14:16:00+00:00

Fix a fall-through warning in fault.c.

Fixes: a035d552a93b ("Makefile: Globally enable fall-through warning")
Signed-off-by: Helge Deller

parisc: Flush ITLB in flush_tlb_all_local() only on split TLB machines

2019-07-21T09:03:02+00:00

flush_tlb_all_local() flushes the ITLB and DTLB of the CPU.
In case the machine does not have separate ITLBs and DTLBs, use the
alternative functionality to replace the code which flushes the ITLB
with nops while keeping the code which flushes the DTLB.

Signed-off-by: Helge Deller