[PATCH 0/2] Fix the warnings in the 32-bit platform

[PATCH 0/2] Fix the warnings in the 32-bit platform

[Ben Zong-You Xie]

This series fix two incompatible type warnings when building perf in the 
32-bit platform. 

Ben Zong-You Xie (2):
  perf daemon: Fix the warning about time_t
  perf riscv: Fix the warning due to the incompatible type

 tools/perf/arch/riscv/util/header.c | 2 +-
 tools/perf/builtin-daemon.c         | 9 +++++----
 2 files changed, 6 insertions(+), 5 deletions(-)

-- 
2.34.1

[PATCH 1/2] perf daemon: Fix the warning about time_t

[Ben Zong-You Xie]

In the 32-bit platform, the size of time_t is still 64 bits. Thus, use 
PRIu64 to resolve the format problem.

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 tools/perf/builtin-daemon.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
index 83954af36753..0b6ffd51c475 100644
--- a/tools/perf/builtin-daemon.c
+++ b/tools/perf/builtin-daemon.c
@@ -23,6 +23,7 @@
 #include <sys/signalfd.h>
 #include <sys/wait.h>
 #include <poll.h>
+#include <inttypes.h>
 #include "builtin.h"
 #include "perf.h"
 #include "debug.h"
@@ -688,7 +689,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 			/* lock */
 			csv_sep, daemon->base, "lock");
 
-		fprintf(out, "%c%lu",
+		fprintf(out, "%c%" PRIu64 "",
 			/* session up time */
 			csv_sep, (curr - daemon->start) / 60);
 
@@ -700,7 +701,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 				daemon->base, SESSION_OUTPUT);
 			fprintf(out, "  lock:    %s/lock\n",
 				daemon->base);
-			fprintf(out, "  up:      %lu minutes\n",
+			fprintf(out, "  up:      %" PRIu64 " minutes\n",
 				(curr - daemon->start) / 60);
 		}
 	}
@@ -727,7 +728,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 				/* session ack */
 				csv_sep, session->base, SESSION_ACK);
 
-			fprintf(out, "%c%lu",
+			fprintf(out, "%c%" PRIu64 "",
 				/* session up time */
 				csv_sep, (curr - session->start) / 60);
 
@@ -745,7 +746,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
 				session->base, SESSION_CONTROL);
 			fprintf(out, "  ack:     %s/%s\n",
 				session->base, SESSION_ACK);
-			fprintf(out, "  up:      %lu minutes\n",
+			fprintf(out, "  up:      %" PRIu64 " minutes\n",
 				(curr - session->start) / 60);
 		}
 	}
-- 
2.34.1

[PATCH 2/2] perf riscv: Fix the warning due to the incompatible type

[Ben Zong-You Xie]

In the 32-bit platform, the second argument of getline is expectd to be
'size_t *'(aka 'unsigned int *'), but line_sz is of type 
'unsigned long *'. Therefore, declare line_sz as size_t.

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
---
 tools/perf/arch/riscv/util/header.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/arch/riscv/util/header.c b/tools/perf/arch/riscv/util/header.c
index 4a41856938a8..1b29030021ee 100644
--- a/tools/perf/arch/riscv/util/header.c
+++ b/tools/perf/arch/riscv/util/header.c
@@ -41,7 +41,7 @@ static char *_get_cpuid(void)
 	char *mimpid = NULL;
 	char *cpuid = NULL;
 	int read;
-	unsigned long line_sz;
+	size_t line_sz;
 	FILE *cpuinfo;
 
 	cpuinfo = fopen(CPUINFO, "r");
-- 
2.34.1

Re: [PATCH 0/2] Fix the warnings in the 32-bit platform

[Alexandre Ghiti]

Hi Ben,

On 05/03/2024 13:04, Ben Zong-You Xie wrote:
> This series fix two incompatible type warnings when building perf in the
> 32-bit platform.
>
> Ben Zong-You Xie (2):
>    perf daemon: Fix the warning about time_t
>    perf riscv: Fix the warning due to the incompatible type
>
>   tools/perf/arch/riscv/util/header.c | 2 +-
>   tools/perf/builtin-daemon.c         | 9 +++++----
>   2 files changed, 6 insertions(+), 5 deletions(-)
>

For the series, you can add:

Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>

To me this should go into -fixes, but which tree? perf or riscv?

Thanks,

Alex

Re: [PATCH 1/2] perf daemon: Fix the warning about time_t

[Palmer Dabbelt]

On Tue, 05 Mar 2024 04:05:00 PST (-0800), ben717@andestech.com wrote:
> In the 32-bit platform, the size of time_t is still 64 bits. Thus, use
> PRIu64 to resolve the format problem.
>
> Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
> ---
>  tools/perf/builtin-daemon.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
> index 83954af36753..0b6ffd51c475 100644
> --- a/tools/perf/builtin-daemon.c
> +++ b/tools/perf/builtin-daemon.c
> @@ -23,6 +23,7 @@
>  #include <sys/signalfd.h>
>  #include <sys/wait.h>
>  #include <poll.h>
> +#include <inttypes.h>
>  #include "builtin.h"
>  #include "perf.h"
>  #include "debug.h"
> @@ -688,7 +689,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
>  			/* lock */
>  			csv_sep, daemon->base, "lock");
>
> -		fprintf(out, "%c%lu",
> +		fprintf(out, "%c%" PRIu64 "",
>  			/* session up time */
>  			csv_sep, (curr - daemon->start) / 60);
>
> @@ -700,7 +701,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
>  				daemon->base, SESSION_OUTPUT);
>  			fprintf(out, "  lock:    %s/lock\n",
>  				daemon->base);
> -			fprintf(out, "  up:      %lu minutes\n",
> +			fprintf(out, "  up:      %" PRIu64 " minutes\n",
>  				(curr - daemon->start) / 60);
>  		}
>  	}
> @@ -727,7 +728,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
>  				/* session ack */
>  				csv_sep, session->base, SESSION_ACK);
>
> -			fprintf(out, "%c%lu",
> +			fprintf(out, "%c%" PRIu64 "",
>  				/* session up time */
>  				csv_sep, (curr - session->start) / 60);
>
> @@ -745,7 +746,7 @@ static int cmd_session_list(struct daemon *daemon, union cmd *cmd, FILE *out)
>  				session->base, SESSION_CONTROL);
>  			fprintf(out, "  ack:     %s/%s\n",
>  				session->base, SESSION_ACK);
> -			fprintf(out, "  up:      %lu minutes\n",
> +			fprintf(out, "  up:      %" PRIu64 " minutes\n",
>  				(curr - session->start) / 60);
>  		}
>  	}

Sorry I missed this earlier, but IIUC this one is actually incorrect: on 
most 32-bit platforms time_t is 32 bits, it was later extended to 64 
bits.  RISC-V is special because the work to make time_t 64-bit had 
started when we submitted the port, so we just jumped straight to the 
legacy-free uABI (after some headaches).

So IIUC this would introduce a warning for some other targets.  Either 
way I shouldn't have picked it up as it's not a RISC-V patch (this is a 
generic perf file), so I'm going to drop it from fixes.

Sorry for the confusion!