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SubjectRe: [PATCH][2.4.30] __attribute__ placement
From
Date
Hi,

Realised few things are not ok with my earlier patch. The __attribute__
((packed)) problem exists only with typedefed structs. The correct
syntax is

typedef struct ... { .... } __attribute__((packed)) newtype;

Please find the updated patch. Hope I got it right this time.

Thanks
Vinay

arch/s390x/kernel/ptrace.c | 6 +++---
drivers/net/gt96100eth.h | 4 ++--
drivers/s390/net/qeth.h | 4 ++--
drivers/s390/net/qeth_mpc.h | 6 +++---
4 files changed, 10 insertions(+), 10 deletions(-)

==============================================================================
diff -urN linux-2.4.30/arch/s390x/kernel/ptrace.c linux-2.4.30-nvk/arch/s390x/kernel/ptrace.c
--- linux-2.4.30/arch/s390x/kernel/ptrace.c 2003-06-14 10:05:28.000000000 +0530
+++ linux-2.4.30-nvk/arch/s390x/kernel/ptrace.c 2005-04-20 15:29:35.000000000 +0530
@@ -146,14 +146,14 @@
typedef struct
{
__u32 cr[3];
-} per_cr_words32 __attribute__((packed));
+} __attribute__((packed)) per_cr_words32;

typedef struct
{
__u16 perc_atmid; /* 0x096 */
__u32 address; /* 0x098 */
__u8 access_id; /* 0x0a1 */
-} per_lowcore_words32 __attribute__((packed));
+} __attribute__((packed)) per_lowcore_words32;

typedef struct
{
@@ -177,7 +177,7 @@
union {
per_lowcore_words32 words;
} lowcore;
-} per_struct32 __attribute__((packed));
+} __attribute__((packed)) per_struct32;

struct user_regs_struct32
{
diff -urN linux-2.4.30/drivers/net/gt96100eth.h linux-2.4.30-nvk/drivers/net/gt96100eth.h
--- linux-2.4.30/drivers/net/gt96100eth.h 2003-06-14 10:03:16.000000000 +0530
+++ linux-2.4.30-nvk/drivers/net/gt96100eth.h 2005-04-20 15:34:14.000000000 +0530
@@ -214,7 +214,7 @@
u32 cmdstat;
u32 next;
u32 buff_ptr;
-} gt96100_td_t __attribute__ ((packed));
+} __attribute__ ((packed)) gt96100_td_t;

typedef struct {
#ifdef DESC_BE
@@ -227,7 +227,7 @@
u32 cmdstat;
u32 next;
u32 buff_ptr;
-} gt96100_rd_t __attribute__ ((packed));
+} __attribute__ ((packed)) gt96100_rd_t;


/* Values for the Tx command-status descriptor entry. */
diff -urN linux-2.4.30/drivers/s390/net/qeth.h linux-2.4.30-nvk/drivers/s390/net/qeth.h
--- linux-2.4.30/drivers/s390/net/qeth.h 2004-12-04 17:45:26.000000000 +0530
+++ linux-2.4.30-nvk/drivers/s390/net/qeth.h 2005-04-20 15:31:52.000000000 +0530
@@ -760,14 +760,14 @@
typedef struct qeth_ringbuffer_t {
qdio_buffer_t buffer[QDIO_MAX_BUFFERS_PER_Q];
qeth_ringbuffer_element_t ringbuf_element[QDIO_MAX_BUFFERS_PER_Q];
-} qeth_ringbuffer_t __attribute__ ((packed,aligned(PAGE_SIZE)));
+} __attribute__((packed)) qeth_ringbuffer_t __attribute__ ((aligned(PAGE_SIZE)));

typedef struct qeth_dma_stuff_t {
unsigned char *sendbuf;
unsigned char *recbuf;
ccw1_t read_ccw;
ccw1_t write_ccw;
-} qeth_dma_stuff_t __attribute__ ((packed,aligned(PAGE_SIZE)));
+} __attribute__((packed)) qeth_dma_stuff_t __attribute__ ((aligned(PAGE_SIZE)));

typedef struct qeth_perf_stats_t {
unsigned int skbs_rec;
diff -urN linux-2.4.30/drivers/s390/net/qeth_mpc.h linux-2.4.30-nvk/drivers/s390/net/qeth_mpc.h
--- linux-2.4.30/drivers/s390/net/qeth_mpc.h 2004-12-04 17:45:26.000000000 +0530
+++ linux-2.4.30-nvk/drivers/s390/net/qeth_mpc.h 2005-04-20 15:33:16.000000000 +0530
@@ -460,7 +460,7 @@
__u8 unique_id[8];
} create_destroy_addr;
} data;
-} ipa_cmd_t __attribute__ ((packed));
+} __attribute__ ((packed)) ipa_cmd_t;

#define QETH_IOC_MAGIC 0x22
#define QETH_IOCPROC_REGISTER _IOWR(QETH_IOC_MAGIC, 1, int)
@@ -506,7 +506,7 @@
__u8 snmp_data[ARP_DATA_SIZE];
} snmp_subcommand;
} data;
-} snmp_ipa_setadp_cmd_t __attribute__ ((packed));
+} __attribute__ ((packed)) snmp_ipa_setadp_cmd_t;

typedef struct arp_cmd_t {
__u8 command;
@@ -539,7 +539,7 @@
} setassparms;
snmp_ipa_setadp_cmd_t setadapterparms;
} data;
-} arp_cmd_t __attribute__ ((packed));
+} __attribute__ ((packed)) arp_cmd_t;



==============================================================================
On Mon, 2005-04-18 at 20:37 +0530, Vinay K Nallamothu wrote:
> Hi,
>
> The variable attributes "packed" and "align" when used with structure
> should have the following order:
>
> struct ... {...} __attribute__((packed)) var;
>
> This patch fixes few instances where the variable and attributes are
> placed the other way around and had no affect.

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