kernel/git/stable/linux.git/arch/parisc/Makefile, branch linux-5.3.y

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: 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

Merge tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2019-07-12T23:03:16+00:00

Pull Kbuild updates from Masahiro Yamada: - remove headers_{install,check}_all targets - remove unreasonable 'depends on !UML' from CONFIG_SAMPLES - re-implement 'make headers_install' more cleanly - add new header-test-y syntax to compile-test headers - compile-test exported headers to ensure they are compilable in user-space - compile-test headers under include/ to ensure they are self-contained - remove -Waggregate-return, -Wno-uninitialized, -Wno-unused-value flags - add -Werror=unknown-warning-option for Clang - add 128-bit built-in types support to genksyms - fix missed rebuild of modules.builtin - propagate 'No space left on device' error in fixdep to Make - allow Clang to use its integrated assembler - improve some coccinelle scripts - add a new flag KBUILD_ABS_SRCTREE to request Kbuild to use absolute path for $(srctree). - do not ignore errors when compression utility is missing - misc cleanups * tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (49 commits) kbuild: use -- separater intead of $(filter-out ...) for cc-cross-prefix kbuild: Inform user to pass ARCH= for make mrproper kbuild: fix compression errors getting ignored kbuild: add a flag to force absolute path for srctree kbuild: replace KBUILD_SRCTREE with boolean building_out_of_srctree kbuild: remove src and obj from the top Makefile scripts/tags.sh: remove unused environment variables from comments scripts/tags.sh: drop SUBARCH support for ARM kbuild: compile-test kernel headers to ensure they are self-contained kheaders: include only headers into kheaders_data.tar.xz kheaders: remove meaningless -R option of 'ls' kbuild: support header-test-pattern-y kbuild: do not create wrappers for header-test-y kbuild: compile-test exported headers to ensure they are self-contained init/Kconfig: add CONFIG_CC_CAN_LINK kallsyms: exclude kasan local symbols on s390 kbuild: add more hints about SUBDIRS replacement coccinelle: api/stream_open: treat all wait_.*() calls as blocking coccinelle: put_device: Add a cast to an expression for an assignment coccinelle: put_device: Adjust a message construction ...

kbuild: remove src and obj from the top Makefile

2019-07-10T15:05:09+00:00

Replace $(src) and $(obj) with $(srctree) and $(objtree), respectively. Signed-off-by: Masahiro Yamada

parisc: add dynamic ftrace

2019-06-08T10:56:29+00:00

This patch implements dynamic ftrace for PA-RISC. The required mcount call sequences can get pretty long, so instead of patching the whole call sequence out of the functions, we are using -fpatchable-function-entry from gcc. This puts a configurable amount of NOPS before/at the start of the function. Taking do_sys_open() as example, which would look like this when the call is patched out: 1036b248: 08 00 02 40 nop 1036b24c: 08 00 02 40 nop 1036b250: 08 00 02 40 nop 1036b254: 08 00 02 40 nop 1036b258 : 1036b258: 08 00 02 40 nop 1036b25c: 08 03 02 41 copy r3,r1 1036b260: 6b c2 3f d9 stw rp,-14(sp) 1036b264: 08 1e 02 43 copy sp,r3 1036b268: 6f c1 01 00 stw,ma r1,80(sp) When ftrace gets enabled for this function the kernel will patch these NOPs to: 1036b248: 10 19 57 20

1036b24c: 6f c1 00 80 stw,ma r1,40(sp) 1036b250: 48 21 3f d1 ldw -18(r1),r1 1036b254: e8 20 c0 02 bv,n r0(r1) 1036b258 : 1036b258: e8 3f 1f df b,l,n .-c,r1 1036b25c: 08 03 02 41 copy r3,r1 1036b260: 6b c2 3f d9 stw rp,-14(sp) 1036b264: 08 1e 02 43 copy sp,r3 1036b268: 6f c1 01 00 stw,ma r1,80(sp) So the first NOP in do_sys_open() will be patched to jump backwards into some minimal trampoline code which pushes a stackframe, saves r1 which holds the return address, loads the address of the real ftrace function, and branches to that location. For 64 Bit things are getting a bit more complicated (and longer) because we must make sure that the address of ftrace location is 8 byte aligned, and the offset passed to ldd for fetching the address is 8 byte aligned as well. Note that gcc has a bug which misplaces the function label, and needs a patch to make dynamic ftrace work. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90751 for details. Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller

parisc: generate uapi header and system call table files

2018-12-10T07:26:04+00:00

System call table generation script must be run to gener- ate unistd_32/64.h and syscall_table_32/64/c32.h files. This patch will have changes which will invokes the script. This patch will generate unistd_32/64.h and syscall_table- _32/64/c32.h files by the syscall table generation script invoked by parisc/Makefile and the generated files against the removed files must be identical. The generated uapi header file will be included in uapi/- asm/unistd.h and generated system call table header file will be included by kernel/syscall.S file. Signed-off-by: Firoz Khan Acked-by: Helge Deller Signed-off-by: Helge Deller

parisc: Enable -ffunction-sections for modules on 32-bit kernel

2018-12-02T19:34:07+00:00

Frank Schreiner reported, that since kernel 4.18 he faces sysfs-warnings when loading modules on a 32-bit kernel. Here is one such example: sysfs: cannot create duplicate filename '/module/nfs/sections/.text' CPU: 0 PID: 98 Comm: modprobe Not tainted 4.18.0-2-parisc #1 Debian 4.18.10-2 Backtrace: [<1017ce2c>] show_stack+0x3c/0x50 [<107a7210>] dump_stack+0x28/0x38 [<103f900c>] sysfs_warn_dup+0x88/0xac [<103f8b1c>] sysfs_add_file_mode_ns+0x164/0x1d0 [<103f9e70>] internal_create_group+0x11c/0x304 [<103fa0a0>] sysfs_create_group+0x48/0x60 [<1022abe8>] load_module.constprop.35+0x1f9c/0x23b8 [<1022b278>] sys_finit_module+0xd0/0x11c [<101831dc>] syscall_exit+0x0/0x14 This warning gets triggered by the fact, that due to commit 24b6c22504a2 ("parisc: Build kernel without -ffunction-sections") we now get multiple .text sections in the kernel modules for which sysfs_create_group() can't create multiple virtual files. This patch works around the problem by re-enabling the -ffunction-sections compiler option for modules, while keeping it disabled for the non-module kernel code. Reported-by: Frank Scheiner Fixes: 24b6c22504a2 ("parisc: Build kernel without -ffunction-sections") Cc: # v4.18+ Signed-off-by: Helge Deller

parisc: remove check for minimum required GCC version

2018-10-17T06:18:00+00:00

Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6") bumped the minimum GCC version to 4.6 for all architectures. The version check in arch/parisc/Makefile is obsolete now. Signed-off-by: Masahiro Yamada Signed-off-by: Helge Deller

parisc: Build kernel without -ffunction-sections

2018-06-29T15:27:20+00:00

As suggested by Nick Piggin it seems we can drop the -ffunction-sections compile flag, now that the kernel uses thin archives. Testing with 32- and 64-bit kernel showed no difference in kernel size. Suggested-by: Nicholas Piggin Signed-off-by: Helge Deller

kbuild: add machine size to CHECKFLAGS

2018-06-01T02:36:58+00:00

By default, sparse assumes a 64bit machine when compiled on x86-64 and 32bit when compiled on anything else. This can of course create all sort of problems for the other archs, like issuing false warnings ('shift too big (32) for type unsigned long'), or worse, failing to emit legitimate warnings. Fix this by adding the -m32/-m64 flag, depending on CONFIG_64BIT, to CHECKFLAGS in the main Makefile (and so for all archs). Also, remove the now unneeded -m32/-m64 in arch specific Makefiles. Signed-off-by: Luc Van Oostenryck Signed-off-by: Masahiro Yamada