* [PATCH v2 0/3] PPC: Fix -Wimplicit-fallthrough for clang
@ 2020-11-18 0:07 ` Nick Desaulniers
0 siblings, 0 replies; 12+ messages in thread
From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw)
To: Gustavo A . R . Silva
Cc: clang-built-linux, Nick Desaulniers, linux-kernel, Miguel Ojeda,
Arvind Sankar, Paul Mackerras, Nathan Chancellor, linuxppc-dev
While cleaning up the last few -Wimplicit-fallthrough warnings in tree
for Clang, I noticed
commit 6a9dc5fd6170d ("lib: Revert use of fallthrough pseudo-keyword in lib/")
which seemed to undo a bunch of fixes in lib/ due to breakage in
arch/powerpc/boot/ not including compiler_types.h. We don't need
compiler_types.h for the definition of `fallthrough`, simply
compiler_attributes.h. Include that, revert the revert to lib/, and fix
the last remaining cases I observed for powernv_defconfig.
Changes V1->V2:
* collect tags via b4 (fix Gustavo's tag as per Miguel in patch 2/3).
* reword commit message of patch 1/3 as per Arvind.
* reformat patch 2/3 as per kernel test robot and Gustavo.
Nick Desaulniers (3):
powerpc: boot: include compiler_attributes.h
Revert "lib: Revert use of fallthrough pseudo-keyword in lib/"
powerpc: fix -Wimplicit-fallthrough
arch/powerpc/boot/Makefile | 1 +
arch/powerpc/boot/decompress.c | 1 -
arch/powerpc/kernel/prom_init.c | 1 +
arch/powerpc/kernel/uprobes.c | 1 +
arch/powerpc/perf/imc-pmu.c | 1 +
lib/asn1_decoder.c | 4 ++--
lib/assoc_array.c | 2 +-
lib/bootconfig.c | 4 ++--
lib/cmdline.c | 10 ++++-----
lib/dim/net_dim.c | 2 +-
lib/dim/rdma_dim.c | 4 ++--
lib/glob.c | 2 +-
lib/siphash.c | 36 ++++++++++++++++-----------------
lib/ts_fsm.c | 2 +-
lib/vsprintf.c | 14 ++++++-------
lib/xz/xz_dec_lzma2.c | 4 ++--
lib/xz/xz_dec_stream.c | 16 +++++++--------
lib/zstd/bitstream.h | 10 ++++-----
lib/zstd/compress.c | 2 +-
lib/zstd/decompress.c | 12 +++++------
lib/zstd/huf_compress.c | 17 +++++++++++-----
21 files changed, 78 insertions(+), 68 deletions(-)
--
2.29.2.299.gdc1121823c-goog
^ permalink raw reply [flat|nested] 12+ messages in thread* [PATCH v2 0/3] PPC: Fix -Wimplicit-fallthrough for clang @ 2020-11-18 0:07 ` Nick Desaulniers 0 siblings, 0 replies; 12+ messages in thread From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw) To: Gustavo A . R . Silva Cc: Nathan Chancellor, Miguel Ojeda, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, clang-built-linux, linuxppc-dev, linux-kernel, Arvind Sankar, Nick Desaulniers While cleaning up the last few -Wimplicit-fallthrough warnings in tree for Clang, I noticed commit 6a9dc5fd6170d ("lib: Revert use of fallthrough pseudo-keyword in lib/") which seemed to undo a bunch of fixes in lib/ due to breakage in arch/powerpc/boot/ not including compiler_types.h. We don't need compiler_types.h for the definition of `fallthrough`, simply compiler_attributes.h. Include that, revert the revert to lib/, and fix the last remaining cases I observed for powernv_defconfig. Changes V1->V2: * collect tags via b4 (fix Gustavo's tag as per Miguel in patch 2/3). * reword commit message of patch 1/3 as per Arvind. * reformat patch 2/3 as per kernel test robot and Gustavo. Nick Desaulniers (3): powerpc: boot: include compiler_attributes.h Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" powerpc: fix -Wimplicit-fallthrough arch/powerpc/boot/Makefile | 1 + arch/powerpc/boot/decompress.c | 1 - arch/powerpc/kernel/prom_init.c | 1 + arch/powerpc/kernel/uprobes.c | 1 + arch/powerpc/perf/imc-pmu.c | 1 + lib/asn1_decoder.c | 4 ++-- lib/assoc_array.c | 2 +- lib/bootconfig.c | 4 ++-- lib/cmdline.c | 10 ++++----- lib/dim/net_dim.c | 2 +- lib/dim/rdma_dim.c | 4 ++-- lib/glob.c | 2 +- lib/siphash.c | 36 ++++++++++++++++----------------- lib/ts_fsm.c | 2 +- lib/vsprintf.c | 14 ++++++------- lib/xz/xz_dec_lzma2.c | 4 ++-- lib/xz/xz_dec_stream.c | 16 +++++++-------- lib/zstd/bitstream.h | 10 ++++----- lib/zstd/compress.c | 2 +- lib/zstd/decompress.c | 12 +++++------ lib/zstd/huf_compress.c | 17 +++++++++++----- 21 files changed, 78 insertions(+), 68 deletions(-) -- 2.29.2.299.gdc1121823c-goog ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v2 1/3] powerpc: boot: include compiler_attributes.h 2020-11-18 0:07 ` Nick Desaulniers @ 2020-11-18 0:07 ` Nick Desaulniers -1 siblings, 0 replies; 12+ messages in thread From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw) To: Gustavo A . R . Silva Cc: clang-built-linux, Nick Desaulniers, linux-kernel, Miguel Ojeda, Arvind Sankar, Paul Mackerras, Miguel Ojeda, Nathan Chancellor, linuxppc-dev The kernel uses `-include` to include include/linux/compiler_types.h into all translation units (see scripts/Makefile.lib), which #includes compiler_attributes.h. arch/powerpc/boot/ uses different compiler flags from the rest of the kernel. As such, it doesn't contain the definitions from these headers, and redefines a few that it needs. For the purpose of enabling -Wimplicit-fallthrough for ppc, include compiler_attributes.h via `-include`. It was also noted in 6a9dc5fd6170 that we could -D__KERNEL__ and -include compiler_types.h like the main kernel does, though testing that produces a whole sea of warnings to cleanup. This approach is minimally invasive. Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org> Acked-by: Miguel Ojeda <ojeda@kernel.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://github.com/ClangBuiltLinux/linux/issues/236 --- arch/powerpc/boot/Makefile | 1 + arch/powerpc/boot/decompress.c | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile index f8ce6d2dde7b..1659963a8f1d 100644 --- a/arch/powerpc/boot/Makefile +++ b/arch/powerpc/boot/Makefile @@ -31,6 +31,7 @@ endif BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -O2 -msoft-float -mno-altivec -mno-vsx \ -pipe -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \ + -include $(srctree)/include/linux/compiler_attributes.h \ $(LINUXINCLUDE) ifdef CONFIG_PPC64_BOOT_WRAPPER diff --git a/arch/powerpc/boot/decompress.c b/arch/powerpc/boot/decompress.c index 8bf39ef7d2df..6098b879ac97 100644 --- a/arch/powerpc/boot/decompress.c +++ b/arch/powerpc/boot/decompress.c @@ -21,7 +21,6 @@ #define STATIC static #define INIT -#define __always_inline inline /* * The build process will copy the required zlib source files and headers -- 2.29.2.299.gdc1121823c-goog ^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 1/3] powerpc: boot: include compiler_attributes.h @ 2020-11-18 0:07 ` Nick Desaulniers 0 siblings, 0 replies; 12+ messages in thread From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw) To: Gustavo A . R . Silva Cc: Nathan Chancellor, Miguel Ojeda, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, clang-built-linux, linuxppc-dev, linux-kernel, Arvind Sankar, Nick Desaulniers, Miguel Ojeda The kernel uses `-include` to include include/linux/compiler_types.h into all translation units (see scripts/Makefile.lib), which #includes compiler_attributes.h. arch/powerpc/boot/ uses different compiler flags from the rest of the kernel. As such, it doesn't contain the definitions from these headers, and redefines a few that it needs. For the purpose of enabling -Wimplicit-fallthrough for ppc, include compiler_attributes.h via `-include`. It was also noted in 6a9dc5fd6170 that we could -D__KERNEL__ and -include compiler_types.h like the main kernel does, though testing that produces a whole sea of warnings to cleanup. This approach is minimally invasive. Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org> Acked-by: Miguel Ojeda <ojeda@kernel.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://github.com/ClangBuiltLinux/linux/issues/236 --- arch/powerpc/boot/Makefile | 1 + arch/powerpc/boot/decompress.c | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile index f8ce6d2dde7b..1659963a8f1d 100644 --- a/arch/powerpc/boot/Makefile +++ b/arch/powerpc/boot/Makefile @@ -31,6 +31,7 @@ endif BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -O2 -msoft-float -mno-altivec -mno-vsx \ -pipe -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \ + -include $(srctree)/include/linux/compiler_attributes.h \ $(LINUXINCLUDE) ifdef CONFIG_PPC64_BOOT_WRAPPER diff --git a/arch/powerpc/boot/decompress.c b/arch/powerpc/boot/decompress.c index 8bf39ef7d2df..6098b879ac97 100644 --- a/arch/powerpc/boot/decompress.c +++ b/arch/powerpc/boot/decompress.c @@ -21,7 +21,6 @@ #define STATIC static #define INIT -#define __always_inline inline /* * The build process will copy the required zlib source files and headers -- 2.29.2.299.gdc1121823c-goog ^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH v2 1/3] powerpc: boot: include compiler_attributes.h 2020-11-18 0:07 ` Nick Desaulniers @ 2020-11-18 0:24 ` Miguel Ojeda -1 siblings, 0 replies; 12+ messages in thread From: Miguel Ojeda @ 2020-11-18 0:24 UTC (permalink / raw) To: Nick Desaulniers, Gustavo A . R . Silva Cc: linux-kernel, clang-built-linux, Arvind Sankar, Paul Mackerras, Miguel Ojeda, Nathan Chancellor, linuxppc-dev On Wed, Nov 18, 2020 at 1:08 AM Nick Desaulniers <ndesaulniers@google.com> wrote: > > It was also noted in 6a9dc5fd6170 that we could -D__KERNEL__ and > -include compiler_types.h like the main kernel does, though testing that > produces a whole sea of warnings to cleanup. (Re; for Gustavo to consider since he took it now): I would add a comment noting this as a reminder -- it also helps to entice a cleanup. Cheers, Miguel ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH v2 1/3] powerpc: boot: include compiler_attributes.h @ 2020-11-18 0:24 ` Miguel Ojeda 0 siblings, 0 replies; 12+ messages in thread From: Miguel Ojeda @ 2020-11-18 0:24 UTC (permalink / raw) To: Nick Desaulniers, Gustavo A . R . Silva Cc: Nathan Chancellor, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, clang-built-linux, linuxppc-dev, linux-kernel, Arvind Sankar, Miguel Ojeda On Wed, Nov 18, 2020 at 1:08 AM Nick Desaulniers <ndesaulniers@google.com> wrote: > > It was also noted in 6a9dc5fd6170 that we could -D__KERNEL__ and > -include compiler_types.h like the main kernel does, though testing that > produces a whole sea of warnings to cleanup. (Re; for Gustavo to consider since he took it now): I would add a comment noting this as a reminder -- it also helps to entice a cleanup. Cheers, Miguel ^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v2 2/3] Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 0:07 ` Nick Desaulniers @ 2020-11-18 0:07 ` Nick Desaulniers -1 siblings, 0 replies; 12+ messages in thread From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw) To: Gustavo A . R . Silva Cc: kernel test robot, clang-built-linux, Nick Desaulniers, linux-kernel, Miguel Ojeda, Arvind Sankar, Paul Mackerras, Miguel Ojeda, Nathan Chancellor, linuxppc-dev This reverts commit 6a9dc5fd6170 ("lib: Revert use of fallthrough pseudo-keyword in lib/") Now that we can build arch/powerpc/boot/ free of -Wimplicit-fallthrough, re-enable these fixes for lib/. Reformats HUF_compress1X_usingCTable() in lib/zstd/huf_compress.c to avoid a smatch warning on "inconsistent indenting" reported by kernel test robot. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Link: https://github.com/ClangBuiltLinux/linux/issues/236 --- lib/asn1_decoder.c | 4 ++-- lib/assoc_array.c | 2 +- lib/bootconfig.c | 4 ++-- lib/cmdline.c | 10 +++++----- lib/dim/net_dim.c | 2 +- lib/dim/rdma_dim.c | 4 ++-- lib/glob.c | 2 +- lib/siphash.c | 36 ++++++++++++++++++------------------ lib/ts_fsm.c | 2 +- lib/vsprintf.c | 14 +++++++------- lib/xz/xz_dec_lzma2.c | 4 ++-- lib/xz/xz_dec_stream.c | 16 ++++++++-------- lib/zstd/bitstream.h | 10 +++++----- lib/zstd/compress.c | 2 +- lib/zstd/decompress.c | 12 ++++++------ lib/zstd/huf_compress.c | 17 ++++++++++++----- 16 files changed, 74 insertions(+), 67 deletions(-) diff --git a/lib/asn1_decoder.c b/lib/asn1_decoder.c index 58f72b25f8e9..13da529e2e72 100644 --- a/lib/asn1_decoder.c +++ b/lib/asn1_decoder.c @@ -381,7 +381,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder, case ASN1_OP_END_SET_ACT: if (unlikely(!(flags & FLAG_MATCHED))) goto tag_mismatch; - /* fall through */ + fallthrough; case ASN1_OP_END_SEQ: case ASN1_OP_END_SET_OF: @@ -448,7 +448,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder, pc += asn1_op_lengths[op]; goto next_op; } - /* fall through */ + fallthrough; case ASN1_OP_ACT: ret = actions[machine[pc + 1]](context, hdr, tag, data + tdp, len); diff --git a/lib/assoc_array.c b/lib/assoc_array.c index 6f4bcf524554..04c98799c3ba 100644 --- a/lib/assoc_array.c +++ b/lib/assoc_array.c @@ -1113,7 +1113,7 @@ struct assoc_array_edit *assoc_array_delete(struct assoc_array *array, index_key)) goto found_leaf; } - /* fall through */ + fallthrough; case assoc_array_walk_tree_empty: case assoc_array_walk_found_wrong_shortcut: default: diff --git a/lib/bootconfig.c b/lib/bootconfig.c index 649ed44f199c..9f8c70a98fcf 100644 --- a/lib/bootconfig.c +++ b/lib/bootconfig.c @@ -827,7 +827,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos) q - 2); break; } - /* fall through */ + fallthrough; case '=': ret = xbc_parse_kv(&p, q, c); break; @@ -836,7 +836,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos) break; case '#': q = skip_comment(q); - /* fall through */ + fallthrough; case ';': case '\n': ret = xbc_parse_key(&p, q); diff --git a/lib/cmdline.c b/lib/cmdline.c index 9e186234edc0..46f2cb4ce6d1 100644 --- a/lib/cmdline.c +++ b/lib/cmdline.c @@ -144,23 +144,23 @@ unsigned long long memparse(const char *ptr, char **retptr) case 'E': case 'e': ret <<= 10; - /* fall through */ + fallthrough; case 'P': case 'p': ret <<= 10; - /* fall through */ + fallthrough; case 'T': case 't': ret <<= 10; - /* fall through */ + fallthrough; case 'G': case 'g': ret <<= 10; - /* fall through */ + fallthrough; case 'M': case 'm': ret <<= 10; - /* fall through */ + fallthrough; case 'K': case 'k': ret <<= 10; diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c index a4db51c21266..06811d866775 100644 --- a/lib/dim/net_dim.c +++ b/lib/dim/net_dim.c @@ -233,7 +233,7 @@ void net_dim(struct dim *dim, struct dim_sample end_sample) schedule_work(&dim->work); break; } - /* fall through */ + fallthrough; case DIM_START_MEASURE: dim_update_sample(end_sample.event_ctr, end_sample.pkt_ctr, end_sample.byte_ctr, &dim->start_sample); diff --git a/lib/dim/rdma_dim.c b/lib/dim/rdma_dim.c index f7e26c7b4749..15462d54758d 100644 --- a/lib/dim/rdma_dim.c +++ b/lib/dim/rdma_dim.c @@ -59,7 +59,7 @@ static bool rdma_dim_decision(struct dim_stats *curr_stats, struct dim *dim) break; case DIM_STATS_WORSE: dim_turn(dim); - /* fall through */ + fallthrough; case DIM_STATS_BETTER: step_res = rdma_dim_step(dim); if (step_res == DIM_ON_EDGE) @@ -94,7 +94,7 @@ void rdma_dim(struct dim *dim, u64 completions) schedule_work(&dim->work); break; } - /* fall through */ + fallthrough; case DIM_START_MEASURE: dim->state = DIM_MEASURE_IN_PROGRESS; dim_update_sample_with_comps(curr_sample->event_ctr, 0, 0, diff --git a/lib/glob.c b/lib/glob.c index 52e3ed7e4a9b..85ecbda45cd8 100644 --- a/lib/glob.c +++ b/lib/glob.c @@ -102,7 +102,7 @@ bool __pure glob_match(char const *pat, char const *str) break; case '\\': d = *pat++; - /* fall through */ + fallthrough; default: /* Literal character */ literal: if (c == d) { diff --git a/lib/siphash.c b/lib/siphash.c index c47bb6ff2149..a90112ee72a1 100644 --- a/lib/siphash.c +++ b/lib/siphash.c @@ -68,11 +68,11 @@ u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key) bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= le32_to_cpup(data); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; } @@ -101,11 +101,11 @@ u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key) bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= get_unaligned_le32(end); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; } @@ -268,11 +268,11 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key) bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= le32_to_cpup(data); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; } @@ -301,11 +301,11 @@ u32 __hsiphash_unaligned(const void *data, size_t len, bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= get_unaligned_le32(end); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; } @@ -431,7 +431,7 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key) v0 ^= m; } switch (left) { - case 3: b |= ((u32)end[2]) << 16; /* fall through */ + case 3: b |= ((u32)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; } @@ -454,7 +454,7 @@ u32 __hsiphash_unaligned(const void *data, size_t len, v0 ^= m; } switch (left) { - case 3: b |= ((u32)end[2]) << 16; /* fall through */ + case 3: b |= ((u32)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; } diff --git a/lib/ts_fsm.c b/lib/ts_fsm.c index ab749ec10ab5..64fd9015ad80 100644 --- a/lib/ts_fsm.c +++ b/lib/ts_fsm.c @@ -193,7 +193,7 @@ static unsigned int fsm_find(struct ts_config *conf, struct ts_state *state) TOKEN_MISMATCH(); block_idx++; - /* fall through */ + fallthrough; case TS_FSM_ANY: if (next == NULL) diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 14c9a6af1b23..d3c5c16f391c 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1265,7 +1265,7 @@ char *mac_address_string(char *buf, char *end, u8 *addr, case 'R': reversed = true; - /* fall through */ + fallthrough; default: separator = ':'; @@ -1682,7 +1682,7 @@ char *uuid_string(char *buf, char *end, const u8 *addr, switch (*(++fmt)) { case 'L': uc = true; - /* fall through */ + fallthrough; case 'l': index = guid_index; break; @@ -2219,7 +2219,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, case 'S': case 's': ptr = dereference_symbol_descriptor(ptr); - /* fall through */ + fallthrough; case 'B': return symbol_string(buf, end, ptr, spec, fmt); case 'R': @@ -2450,7 +2450,7 @@ int format_decode(const char *fmt, struct printf_spec *spec) case 'x': spec->flags |= SMALL; - /* fall through */ + fallthrough; case 'X': spec->base = 16; @@ -2468,7 +2468,7 @@ int format_decode(const char *fmt, struct printf_spec *spec) * utility, treat it as any other invalid or * unsupported format specifier. */ - /* fall through */ + fallthrough; default: WARN_ONCE(1, "Please remove unsupported %%%c in format string\n", *fmt); @@ -3411,10 +3411,10 @@ int vsscanf(const char *buf, const char *fmt, va_list args) break; case 'i': base = 0; - /* fall through */ + fallthrough; case 'd': is_sign = true; - /* fall through */ + fallthrough; case 'u': break; case '%': diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c index 65a1aad8c223..ca2603abee08 100644 --- a/lib/xz/xz_dec_lzma2.c +++ b/lib/xz/xz_dec_lzma2.c @@ -1043,7 +1043,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s, s->lzma2.sequence = SEQ_LZMA_PREPARE; - /* fall through */ + fallthrough; case SEQ_LZMA_PREPARE: if (s->lzma2.compressed < RC_INIT_BYTES) @@ -1055,7 +1055,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s, s->lzma2.compressed -= RC_INIT_BYTES; s->lzma2.sequence = SEQ_LZMA_RUN; - /* fall through */ + fallthrough; case SEQ_LZMA_RUN: /* diff --git a/lib/xz/xz_dec_stream.c b/lib/xz/xz_dec_stream.c index 32ab2a08b7cb..fea86deaaa01 100644 --- a/lib/xz/xz_dec_stream.c +++ b/lib/xz/xz_dec_stream.c @@ -583,7 +583,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) if (ret != XZ_OK) return ret; - /* fall through */ + fallthrough; case SEQ_BLOCK_START: /* We need one byte of input to continue. */ @@ -608,7 +608,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->temp.pos = 0; s->sequence = SEQ_BLOCK_HEADER; - /* fall through */ + fallthrough; case SEQ_BLOCK_HEADER: if (!fill_temp(s, b)) @@ -620,7 +620,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_BLOCK_UNCOMPRESS; - /* fall through */ + fallthrough; case SEQ_BLOCK_UNCOMPRESS: ret = dec_block(s, b); @@ -629,7 +629,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_BLOCK_PADDING; - /* fall through */ + fallthrough; case SEQ_BLOCK_PADDING: /* @@ -651,7 +651,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_BLOCK_CHECK; - /* fall through */ + fallthrough; case SEQ_BLOCK_CHECK: if (s->check_type == XZ_CHECK_CRC32) { @@ -675,7 +675,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_INDEX_PADDING; - /* fall through */ + fallthrough; case SEQ_INDEX_PADDING: while ((s->index.size + (b->in_pos - s->in_start)) @@ -699,7 +699,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_INDEX_CRC32; - /* fall through */ + fallthrough; case SEQ_INDEX_CRC32: ret = crc32_validate(s, b); @@ -709,7 +709,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->temp.size = STREAM_HEADER_SIZE; s->sequence = SEQ_STREAM_FOOTER; - /* fall through */ + fallthrough; case SEQ_STREAM_FOOTER: if (!fill_temp(s, b)) diff --git a/lib/zstd/bitstream.h b/lib/zstd/bitstream.h index 3a49784d5c61..7c65c66e41fd 100644 --- a/lib/zstd/bitstream.h +++ b/lib/zstd/bitstream.h @@ -259,15 +259,15 @@ ZSTD_STATIC size_t BIT_initDStream(BIT_DStream_t *bitD, const void *srcBuffer, s bitD->bitContainer = *(const BYTE *)(bitD->start); switch (srcSize) { case 7: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[6]) << (sizeof(bitD->bitContainer) * 8 - 16); - /* fall through */ + fallthrough; case 6: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[5]) << (sizeof(bitD->bitContainer) * 8 - 24); - /* fall through */ + fallthrough; case 5: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[4]) << (sizeof(bitD->bitContainer) * 8 - 32); - /* fall through */ + fallthrough; case 4: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[3]) << 24; - /* fall through */ + fallthrough; case 3: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[2]) << 16; - /* fall through */ + fallthrough; case 2: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[1]) << 8; default:; } diff --git a/lib/zstd/compress.c b/lib/zstd/compress.c index 5e0b67003e55..b080264ed3ad 100644 --- a/lib/zstd/compress.c +++ b/lib/zstd/compress.c @@ -3182,7 +3182,7 @@ static size_t ZSTD_compressStream_generic(ZSTD_CStream *zcs, void *dst, size_t * zcs->outBuffFlushedSize = 0; zcs->stage = zcss_flush; /* pass-through to flush stage */ } - /* fall through */ + fallthrough; case zcss_flush: { size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize; diff --git a/lib/zstd/decompress.c b/lib/zstd/decompress.c index db6761ea4deb..66cd487a326a 100644 --- a/lib/zstd/decompress.c +++ b/lib/zstd/decompress.c @@ -442,7 +442,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize case set_repeat: if (dctx->litEntropy == 0) return ERROR(dictionary_corrupted); - /* fall through */ + fallthrough; case set_compressed: if (srcSize < 5) return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need up to 5 for case 3 */ @@ -1768,7 +1768,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx *dctx, void *dst, size_t dstCapacity, c return 0; } dctx->expected = 0; /* not necessary to copy more */ - /* fall through */ + fallthrough; case ZSTDds_decodeFrameHeader: memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected); @@ -2309,7 +2309,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB switch (zds->stage) { case zdss_init: ZSTD_resetDStream(zds); /* transparent reset on starting decoding a new frame */ - /* fall through */ + fallthrough; case zdss_loadHeader: { size_t const hSize = ZSTD_getFrameParams(&zds->fParams, zds->headerBuffer, zds->lhSize); @@ -2376,7 +2376,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB } zds->stage = zdss_read; } - /* fall through */ + fallthrough; case zdss_read: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2405,7 +2405,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB zds->stage = zdss_load; /* pass-through */ } - /* fall through */ + fallthrough; case zdss_load: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2438,7 +2438,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB /* pass-through */ } } - /* fall through */ + fallthrough; case zdss_flush: { size_t const toFlushSize = zds->outEnd - zds->outStart; diff --git a/lib/zstd/huf_compress.c b/lib/zstd/huf_compress.c index e727812d12aa..e23279089293 100644 --- a/lib/zstd/huf_compress.c +++ b/lib/zstd/huf_compress.c @@ -555,11 +555,18 @@ size_t HUF_compress1X_usingCTable(void *dst, size_t dstSize, const void *src, si n = srcSize & ~3; /* join to mod 4 */ switch (srcSize & 3) { - case 3: HUF_encodeSymbol(&bitC, ip[n + 2], CTable); HUF_FLUSHBITS_2(&bitC); - /* fall through */ - case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC); - /* fall through */ - case 1: HUF_encodeSymbol(&bitC, ip[n + 0], CTable); HUF_FLUSHBITS(&bitC); + case 3: + HUF_encodeSymbol(&bitC, ip[n + 2], CTable); + HUF_FLUSHBITS_2(&bitC); + fallthrough; + case 2: + HUF_encodeSymbol(&bitC, ip[n + 1], CTable); + HUF_FLUSHBITS_1(&bitC); + fallthrough; + case 1: + HUF_encodeSymbol(&bitC, ip[n + 0], CTable); + HUF_FLUSHBITS(&bitC); + break; case 0: default:; } -- 2.29.2.299.gdc1121823c-goog ^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 2/3] Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" @ 2020-11-18 0:07 ` Nick Desaulniers 0 siblings, 0 replies; 12+ messages in thread From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw) To: Gustavo A . R . Silva Cc: Nathan Chancellor, Miguel Ojeda, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, clang-built-linux, linuxppc-dev, linux-kernel, Arvind Sankar, Nick Desaulniers, kernel test robot, Miguel Ojeda This reverts commit 6a9dc5fd6170 ("lib: Revert use of fallthrough pseudo-keyword in lib/") Now that we can build arch/powerpc/boot/ free of -Wimplicit-fallthrough, re-enable these fixes for lib/. Reformats HUF_compress1X_usingCTable() in lib/zstd/huf_compress.c to avoid a smatch warning on "inconsistent indenting" reported by kernel test robot. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Link: https://github.com/ClangBuiltLinux/linux/issues/236 --- lib/asn1_decoder.c | 4 ++-- lib/assoc_array.c | 2 +- lib/bootconfig.c | 4 ++-- lib/cmdline.c | 10 +++++----- lib/dim/net_dim.c | 2 +- lib/dim/rdma_dim.c | 4 ++-- lib/glob.c | 2 +- lib/siphash.c | 36 ++++++++++++++++++------------------ lib/ts_fsm.c | 2 +- lib/vsprintf.c | 14 +++++++------- lib/xz/xz_dec_lzma2.c | 4 ++-- lib/xz/xz_dec_stream.c | 16 ++++++++-------- lib/zstd/bitstream.h | 10 +++++----- lib/zstd/compress.c | 2 +- lib/zstd/decompress.c | 12 ++++++------ lib/zstd/huf_compress.c | 17 ++++++++++++----- 16 files changed, 74 insertions(+), 67 deletions(-) diff --git a/lib/asn1_decoder.c b/lib/asn1_decoder.c index 58f72b25f8e9..13da529e2e72 100644 --- a/lib/asn1_decoder.c +++ b/lib/asn1_decoder.c @@ -381,7 +381,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder, case ASN1_OP_END_SET_ACT: if (unlikely(!(flags & FLAG_MATCHED))) goto tag_mismatch; - /* fall through */ + fallthrough; case ASN1_OP_END_SEQ: case ASN1_OP_END_SET_OF: @@ -448,7 +448,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder, pc += asn1_op_lengths[op]; goto next_op; } - /* fall through */ + fallthrough; case ASN1_OP_ACT: ret = actions[machine[pc + 1]](context, hdr, tag, data + tdp, len); diff --git a/lib/assoc_array.c b/lib/assoc_array.c index 6f4bcf524554..04c98799c3ba 100644 --- a/lib/assoc_array.c +++ b/lib/assoc_array.c @@ -1113,7 +1113,7 @@ struct assoc_array_edit *assoc_array_delete(struct assoc_array *array, index_key)) goto found_leaf; } - /* fall through */ + fallthrough; case assoc_array_walk_tree_empty: case assoc_array_walk_found_wrong_shortcut: default: diff --git a/lib/bootconfig.c b/lib/bootconfig.c index 649ed44f199c..9f8c70a98fcf 100644 --- a/lib/bootconfig.c +++ b/lib/bootconfig.c @@ -827,7 +827,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos) q - 2); break; } - /* fall through */ + fallthrough; case '=': ret = xbc_parse_kv(&p, q, c); break; @@ -836,7 +836,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos) break; case '#': q = skip_comment(q); - /* fall through */ + fallthrough; case ';': case '\n': ret = xbc_parse_key(&p, q); diff --git a/lib/cmdline.c b/lib/cmdline.c index 9e186234edc0..46f2cb4ce6d1 100644 --- a/lib/cmdline.c +++ b/lib/cmdline.c @@ -144,23 +144,23 @@ unsigned long long memparse(const char *ptr, char **retptr) case 'E': case 'e': ret <<= 10; - /* fall through */ + fallthrough; case 'P': case 'p': ret <<= 10; - /* fall through */ + fallthrough; case 'T': case 't': ret <<= 10; - /* fall through */ + fallthrough; case 'G': case 'g': ret <<= 10; - /* fall through */ + fallthrough; case 'M': case 'm': ret <<= 10; - /* fall through */ + fallthrough; case 'K': case 'k': ret <<= 10; diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c index a4db51c21266..06811d866775 100644 --- a/lib/dim/net_dim.c +++ b/lib/dim/net_dim.c @@ -233,7 +233,7 @@ void net_dim(struct dim *dim, struct dim_sample end_sample) schedule_work(&dim->work); break; } - /* fall through */ + fallthrough; case DIM_START_MEASURE: dim_update_sample(end_sample.event_ctr, end_sample.pkt_ctr, end_sample.byte_ctr, &dim->start_sample); diff --git a/lib/dim/rdma_dim.c b/lib/dim/rdma_dim.c index f7e26c7b4749..15462d54758d 100644 --- a/lib/dim/rdma_dim.c +++ b/lib/dim/rdma_dim.c @@ -59,7 +59,7 @@ static bool rdma_dim_decision(struct dim_stats *curr_stats, struct dim *dim) break; case DIM_STATS_WORSE: dim_turn(dim); - /* fall through */ + fallthrough; case DIM_STATS_BETTER: step_res = rdma_dim_step(dim); if (step_res == DIM_ON_EDGE) @@ -94,7 +94,7 @@ void rdma_dim(struct dim *dim, u64 completions) schedule_work(&dim->work); break; } - /* fall through */ + fallthrough; case DIM_START_MEASURE: dim->state = DIM_MEASURE_IN_PROGRESS; dim_update_sample_with_comps(curr_sample->event_ctr, 0, 0, diff --git a/lib/glob.c b/lib/glob.c index 52e3ed7e4a9b..85ecbda45cd8 100644 --- a/lib/glob.c +++ b/lib/glob.c @@ -102,7 +102,7 @@ bool __pure glob_match(char const *pat, char const *str) break; case '\\': d = *pat++; - /* fall through */ + fallthrough; default: /* Literal character */ literal: if (c == d) { diff --git a/lib/siphash.c b/lib/siphash.c index c47bb6ff2149..a90112ee72a1 100644 --- a/lib/siphash.c +++ b/lib/siphash.c @@ -68,11 +68,11 @@ u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key) bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= le32_to_cpup(data); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; } @@ -101,11 +101,11 @@ u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key) bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= get_unaligned_le32(end); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; } @@ -268,11 +268,11 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key) bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= le32_to_cpup(data); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; } @@ -301,11 +301,11 @@ u32 __hsiphash_unaligned(const void *data, size_t len, bytemask_from_count(left))); #else switch (left) { - case 7: b |= ((u64)end[6]) << 48; /* fall through */ - case 6: b |= ((u64)end[5]) << 40; /* fall through */ - case 5: b |= ((u64)end[4]) << 32; /* fall through */ + case 7: b |= ((u64)end[6]) << 48; fallthrough; + case 6: b |= ((u64)end[5]) << 40; fallthrough; + case 5: b |= ((u64)end[4]) << 32; fallthrough; case 4: b |= get_unaligned_le32(end); break; - case 3: b |= ((u64)end[2]) << 16; /* fall through */ + case 3: b |= ((u64)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; } @@ -431,7 +431,7 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key) v0 ^= m; } switch (left) { - case 3: b |= ((u32)end[2]) << 16; /* fall through */ + case 3: b |= ((u32)end[2]) << 16; fallthrough; case 2: b |= le16_to_cpup(data); break; case 1: b |= end[0]; } @@ -454,7 +454,7 @@ u32 __hsiphash_unaligned(const void *data, size_t len, v0 ^= m; } switch (left) { - case 3: b |= ((u32)end[2]) << 16; /* fall through */ + case 3: b |= ((u32)end[2]) << 16; fallthrough; case 2: b |= get_unaligned_le16(end); break; case 1: b |= end[0]; } diff --git a/lib/ts_fsm.c b/lib/ts_fsm.c index ab749ec10ab5..64fd9015ad80 100644 --- a/lib/ts_fsm.c +++ b/lib/ts_fsm.c @@ -193,7 +193,7 @@ static unsigned int fsm_find(struct ts_config *conf, struct ts_state *state) TOKEN_MISMATCH(); block_idx++; - /* fall through */ + fallthrough; case TS_FSM_ANY: if (next == NULL) diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 14c9a6af1b23..d3c5c16f391c 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1265,7 +1265,7 @@ char *mac_address_string(char *buf, char *end, u8 *addr, case 'R': reversed = true; - /* fall through */ + fallthrough; default: separator = ':'; @@ -1682,7 +1682,7 @@ char *uuid_string(char *buf, char *end, const u8 *addr, switch (*(++fmt)) { case 'L': uc = true; - /* fall through */ + fallthrough; case 'l': index = guid_index; break; @@ -2219,7 +2219,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr, case 'S': case 's': ptr = dereference_symbol_descriptor(ptr); - /* fall through */ + fallthrough; case 'B': return symbol_string(buf, end, ptr, spec, fmt); case 'R': @@ -2450,7 +2450,7 @@ int format_decode(const char *fmt, struct printf_spec *spec) case 'x': spec->flags |= SMALL; - /* fall through */ + fallthrough; case 'X': spec->base = 16; @@ -2468,7 +2468,7 @@ int format_decode(const char *fmt, struct printf_spec *spec) * utility, treat it as any other invalid or * unsupported format specifier. */ - /* fall through */ + fallthrough; default: WARN_ONCE(1, "Please remove unsupported %%%c in format string\n", *fmt); @@ -3411,10 +3411,10 @@ int vsscanf(const char *buf, const char *fmt, va_list args) break; case 'i': base = 0; - /* fall through */ + fallthrough; case 'd': is_sign = true; - /* fall through */ + fallthrough; case 'u': break; case '%': diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c index 65a1aad8c223..ca2603abee08 100644 --- a/lib/xz/xz_dec_lzma2.c +++ b/lib/xz/xz_dec_lzma2.c @@ -1043,7 +1043,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s, s->lzma2.sequence = SEQ_LZMA_PREPARE; - /* fall through */ + fallthrough; case SEQ_LZMA_PREPARE: if (s->lzma2.compressed < RC_INIT_BYTES) @@ -1055,7 +1055,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s, s->lzma2.compressed -= RC_INIT_BYTES; s->lzma2.sequence = SEQ_LZMA_RUN; - /* fall through */ + fallthrough; case SEQ_LZMA_RUN: /* diff --git a/lib/xz/xz_dec_stream.c b/lib/xz/xz_dec_stream.c index 32ab2a08b7cb..fea86deaaa01 100644 --- a/lib/xz/xz_dec_stream.c +++ b/lib/xz/xz_dec_stream.c @@ -583,7 +583,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) if (ret != XZ_OK) return ret; - /* fall through */ + fallthrough; case SEQ_BLOCK_START: /* We need one byte of input to continue. */ @@ -608,7 +608,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->temp.pos = 0; s->sequence = SEQ_BLOCK_HEADER; - /* fall through */ + fallthrough; case SEQ_BLOCK_HEADER: if (!fill_temp(s, b)) @@ -620,7 +620,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_BLOCK_UNCOMPRESS; - /* fall through */ + fallthrough; case SEQ_BLOCK_UNCOMPRESS: ret = dec_block(s, b); @@ -629,7 +629,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_BLOCK_PADDING; - /* fall through */ + fallthrough; case SEQ_BLOCK_PADDING: /* @@ -651,7 +651,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_BLOCK_CHECK; - /* fall through */ + fallthrough; case SEQ_BLOCK_CHECK: if (s->check_type == XZ_CHECK_CRC32) { @@ -675,7 +675,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_INDEX_PADDING; - /* fall through */ + fallthrough; case SEQ_INDEX_PADDING: while ((s->index.size + (b->in_pos - s->in_start)) @@ -699,7 +699,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->sequence = SEQ_INDEX_CRC32; - /* fall through */ + fallthrough; case SEQ_INDEX_CRC32: ret = crc32_validate(s, b); @@ -709,7 +709,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b) s->temp.size = STREAM_HEADER_SIZE; s->sequence = SEQ_STREAM_FOOTER; - /* fall through */ + fallthrough; case SEQ_STREAM_FOOTER: if (!fill_temp(s, b)) diff --git a/lib/zstd/bitstream.h b/lib/zstd/bitstream.h index 3a49784d5c61..7c65c66e41fd 100644 --- a/lib/zstd/bitstream.h +++ b/lib/zstd/bitstream.h @@ -259,15 +259,15 @@ ZSTD_STATIC size_t BIT_initDStream(BIT_DStream_t *bitD, const void *srcBuffer, s bitD->bitContainer = *(const BYTE *)(bitD->start); switch (srcSize) { case 7: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[6]) << (sizeof(bitD->bitContainer) * 8 - 16); - /* fall through */ + fallthrough; case 6: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[5]) << (sizeof(bitD->bitContainer) * 8 - 24); - /* fall through */ + fallthrough; case 5: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[4]) << (sizeof(bitD->bitContainer) * 8 - 32); - /* fall through */ + fallthrough; case 4: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[3]) << 24; - /* fall through */ + fallthrough; case 3: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[2]) << 16; - /* fall through */ + fallthrough; case 2: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[1]) << 8; default:; } diff --git a/lib/zstd/compress.c b/lib/zstd/compress.c index 5e0b67003e55..b080264ed3ad 100644 --- a/lib/zstd/compress.c +++ b/lib/zstd/compress.c @@ -3182,7 +3182,7 @@ static size_t ZSTD_compressStream_generic(ZSTD_CStream *zcs, void *dst, size_t * zcs->outBuffFlushedSize = 0; zcs->stage = zcss_flush; /* pass-through to flush stage */ } - /* fall through */ + fallthrough; case zcss_flush: { size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize; diff --git a/lib/zstd/decompress.c b/lib/zstd/decompress.c index db6761ea4deb..66cd487a326a 100644 --- a/lib/zstd/decompress.c +++ b/lib/zstd/decompress.c @@ -442,7 +442,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize case set_repeat: if (dctx->litEntropy == 0) return ERROR(dictionary_corrupted); - /* fall through */ + fallthrough; case set_compressed: if (srcSize < 5) return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need up to 5 for case 3 */ @@ -1768,7 +1768,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx *dctx, void *dst, size_t dstCapacity, c return 0; } dctx->expected = 0; /* not necessary to copy more */ - /* fall through */ + fallthrough; case ZSTDds_decodeFrameHeader: memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected); @@ -2309,7 +2309,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB switch (zds->stage) { case zdss_init: ZSTD_resetDStream(zds); /* transparent reset on starting decoding a new frame */ - /* fall through */ + fallthrough; case zdss_loadHeader: { size_t const hSize = ZSTD_getFrameParams(&zds->fParams, zds->headerBuffer, zds->lhSize); @@ -2376,7 +2376,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB } zds->stage = zdss_read; } - /* fall through */ + fallthrough; case zdss_read: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2405,7 +2405,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB zds->stage = zdss_load; /* pass-through */ } - /* fall through */ + fallthrough; case zdss_load: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2438,7 +2438,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB /* pass-through */ } } - /* fall through */ + fallthrough; case zdss_flush: { size_t const toFlushSize = zds->outEnd - zds->outStart; diff --git a/lib/zstd/huf_compress.c b/lib/zstd/huf_compress.c index e727812d12aa..e23279089293 100644 --- a/lib/zstd/huf_compress.c +++ b/lib/zstd/huf_compress.c @@ -555,11 +555,18 @@ size_t HUF_compress1X_usingCTable(void *dst, size_t dstSize, const void *src, si n = srcSize & ~3; /* join to mod 4 */ switch (srcSize & 3) { - case 3: HUF_encodeSymbol(&bitC, ip[n + 2], CTable); HUF_FLUSHBITS_2(&bitC); - /* fall through */ - case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC); - /* fall through */ - case 1: HUF_encodeSymbol(&bitC, ip[n + 0], CTable); HUF_FLUSHBITS(&bitC); + case 3: + HUF_encodeSymbol(&bitC, ip[n + 2], CTable); + HUF_FLUSHBITS_2(&bitC); + fallthrough; + case 2: + HUF_encodeSymbol(&bitC, ip[n + 1], CTable); + HUF_FLUSHBITS_1(&bitC); + fallthrough; + case 1: + HUF_encodeSymbol(&bitC, ip[n + 0], CTable); + HUF_FLUSHBITS(&bitC); + break; case 0: default:; } -- 2.29.2.299.gdc1121823c-goog ^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 3/3] powerpc: fix -Wimplicit-fallthrough 2020-11-18 0:07 ` Nick Desaulniers @ 2020-11-18 0:07 ` Nick Desaulniers -1 siblings, 0 replies; 12+ messages in thread From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw) To: Gustavo A . R . Silva Cc: clang-built-linux, Nick Desaulniers, linux-kernel, Miguel Ojeda, Arvind Sankar, Paul Mackerras, Miguel Ojeda, Nathan Chancellor, linuxppc-dev The "fallthrough" pseudo-keyword was added as a portable way to denote intentional fallthrough. Clang will still warn on cases where there is a fallthrough to an immediate break. Add explicit breaks for those cases. Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://github.com/ClangBuiltLinux/linux/issues/236 --- arch/powerpc/kernel/prom_init.c | 1 + arch/powerpc/kernel/uprobes.c | 1 + arch/powerpc/perf/imc-pmu.c | 1 + 3 files changed, 3 insertions(+) diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 38ae5933d917..e9d4eb6144e1 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -355,6 +355,7 @@ static int __init prom_strtobool(const char *s, bool *res) default: break; } + break; default: break; } diff --git a/arch/powerpc/kernel/uprobes.c b/arch/powerpc/kernel/uprobes.c index d200e7df7167..e8a63713e655 100644 --- a/arch/powerpc/kernel/uprobes.c +++ b/arch/powerpc/kernel/uprobes.c @@ -141,6 +141,7 @@ int arch_uprobe_exception_notify(struct notifier_block *self, case DIE_SSTEP: if (uprobe_post_sstep_notifier(regs)) return NOTIFY_STOP; + break; default: break; } diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c index 7b25548ec42b..e106909ff9c3 100644 --- a/arch/powerpc/perf/imc-pmu.c +++ b/arch/powerpc/perf/imc-pmu.c @@ -1500,6 +1500,7 @@ static int update_pmu_ops(struct imc_pmu *pmu) pmu->pmu.stop = trace_imc_event_stop; pmu->pmu.read = trace_imc_event_read; pmu->attr_groups[IMC_FORMAT_ATTR] = &trace_imc_format_group; + break; default: break; } -- 2.29.2.299.gdc1121823c-goog ^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 3/3] powerpc: fix -Wimplicit-fallthrough @ 2020-11-18 0:07 ` Nick Desaulniers 0 siblings, 0 replies; 12+ messages in thread From: Nick Desaulniers @ 2020-11-18 0:07 UTC (permalink / raw) To: Gustavo A . R . Silva Cc: Nathan Chancellor, Miguel Ojeda, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, clang-built-linux, linuxppc-dev, linux-kernel, Arvind Sankar, Nick Desaulniers, Miguel Ojeda The "fallthrough" pseudo-keyword was added as a portable way to denote intentional fallthrough. Clang will still warn on cases where there is a fallthrough to an immediate break. Add explicit breaks for those cases. Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://github.com/ClangBuiltLinux/linux/issues/236 --- arch/powerpc/kernel/prom_init.c | 1 + arch/powerpc/kernel/uprobes.c | 1 + arch/powerpc/perf/imc-pmu.c | 1 + 3 files changed, 3 insertions(+) diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 38ae5933d917..e9d4eb6144e1 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -355,6 +355,7 @@ static int __init prom_strtobool(const char *s, bool *res) default: break; } + break; default: break; } diff --git a/arch/powerpc/kernel/uprobes.c b/arch/powerpc/kernel/uprobes.c index d200e7df7167..e8a63713e655 100644 --- a/arch/powerpc/kernel/uprobes.c +++ b/arch/powerpc/kernel/uprobes.c @@ -141,6 +141,7 @@ int arch_uprobe_exception_notify(struct notifier_block *self, case DIE_SSTEP: if (uprobe_post_sstep_notifier(regs)) return NOTIFY_STOP; + break; default: break; } diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c index 7b25548ec42b..e106909ff9c3 100644 --- a/arch/powerpc/perf/imc-pmu.c +++ b/arch/powerpc/perf/imc-pmu.c @@ -1500,6 +1500,7 @@ static int update_pmu_ops(struct imc_pmu *pmu) pmu->pmu.stop = trace_imc_event_stop; pmu->pmu.read = trace_imc_event_read; pmu->attr_groups[IMC_FORMAT_ATTR] = &trace_imc_format_group; + break; default: break; } -- 2.29.2.299.gdc1121823c-goog ^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH v2 0/3] PPC: Fix -Wimplicit-fallthrough for clang 2020-11-18 0:07 ` Nick Desaulniers @ 2020-11-18 20:27 ` Gustavo A. R. Silva -1 siblings, 0 replies; 12+ messages in thread From: Gustavo A. R. Silva @ 2020-11-18 20:27 UTC (permalink / raw) To: Nick Desaulniers Cc: clang-built-linux, linux-kernel, Miguel Ojeda, Arvind Sankar, Paul Mackerras, Nathan Chancellor, linuxppc-dev Nick, On Tue, Nov 17, 2020 at 04:07:48PM -0800, Nick Desaulniers wrote: > While cleaning up the last few -Wimplicit-fallthrough warnings in tree > for Clang, I noticed > commit 6a9dc5fd6170d ("lib: Revert use of fallthrough pseudo-keyword in lib/") > which seemed to undo a bunch of fixes in lib/ due to breakage in > arch/powerpc/boot/ not including compiler_types.h. We don't need > compiler_types.h for the definition of `fallthrough`, simply > compiler_attributes.h. Include that, revert the revert to lib/, and fix > the last remaining cases I observed for powernv_defconfig. I've added the series to my -next tree, together with Miguel's suggestions. Thanks for the Acks and comments, Michael. -- Gustavo ^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH v2 0/3] PPC: Fix -Wimplicit-fallthrough for clang @ 2020-11-18 20:27 ` Gustavo A. R. Silva 0 siblings, 0 replies; 12+ messages in thread From: Gustavo A. R. Silva @ 2020-11-18 20:27 UTC (permalink / raw) To: Nick Desaulniers Cc: Nathan Chancellor, Miguel Ojeda, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, clang-built-linux, linuxppc-dev, linux-kernel, Arvind Sankar Nick, On Tue, Nov 17, 2020 at 04:07:48PM -0800, Nick Desaulniers wrote: > While cleaning up the last few -Wimplicit-fallthrough warnings in tree > for Clang, I noticed > commit 6a9dc5fd6170d ("lib: Revert use of fallthrough pseudo-keyword in lib/") > which seemed to undo a bunch of fixes in lib/ due to breakage in > arch/powerpc/boot/ not including compiler_types.h. We don't need > compiler_types.h for the definition of `fallthrough`, simply > compiler_attributes.h. Include that, revert the revert to lib/, and fix > the last remaining cases I observed for powernv_defconfig. I've added the series to my -next tree, together with Miguel's suggestions. Thanks for the Acks and comments, Michael. -- Gustavo ^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2020-11-18 20:30 UTC | newest] Thread overview: 12+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2020-11-18 0:07 [PATCH v2 0/3] PPC: Fix -Wimplicit-fallthrough for clang Nick Desaulniers 2020-11-18 0:07 ` Nick Desaulniers 2020-11-18 0:07 ` [PATCH v2 1/3] powerpc: boot: include compiler_attributes.h Nick Desaulniers 2020-11-18 0:07 ` Nick Desaulniers 2020-11-18 0:24 ` Miguel Ojeda 2020-11-18 0:24 ` Miguel Ojeda 2020-11-18 0:07 ` [PATCH v2 2/3] Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" Nick Desaulniers 2020-11-18 0:07 ` Nick Desaulniers 2020-11-18 0:07 ` [PATCH v2 3/3] powerpc: fix -Wimplicit-fallthrough Nick Desaulniers 2020-11-18 0:07 ` Nick Desaulniers 2020-11-18 20:27 ` [PATCH v2 0/3] PPC: Fix -Wimplicit-fallthrough for clang Gustavo A. R. Silva 2020-11-18 20:27 ` Gustavo A. R. Silva
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