On (17/10/08 17:14), Andy Whitcroft didst pronounce:
> Currently we have three types of function:
>
> file local -- marked static in the normal way,
> library local -- external but prefixed with __lh_
> library exported -- external and listed in the library.lds file
>
> While the library prefix works, it does not allow functions to trivially
> move from file local to library local as all references to the function
> have to be modified to the new name.
>
> This patch introduces a new idiom. When a function is intended to be
> library local it is already necessary to declare that function in the
> libhugetlbfs_internal.h, if we also add a single define for that function
> adding the __lh_ prefix (as below) then all other references including the
> original definition may use the original name unchanged but the function
> will remain unexported:
>
> #define hpool_sizes __lh_hpool_sizes
> extern int hpool_sizes(struct hpage_pool *, int);
>
> This patch converts all current library local functions to this new idiom.
>
> Signed-off-by: Andy Whitcroft <[EMAIL PROTECTED]>
There are two spaces vs tabs issues noted below, but it's not a biggie.
Other than that, I didn't spot anything bad.
Acked-by: Mel Gorman <[EMAIL PROTECTED]>
> ---
> alloc.c | 2 +-
> debug.c | 2 +-
> elflink.c | 6 +++---
> hugeadm.c | 14 +++++++-------
> hugetlbfs.h | 3 ++-
> hugeutils.c | 20 ++++++++++----------
> init.c | 10 +++++-----
> kernel-features.c | 2 +-
> libhugetlbfs_internal.h | 33 ++++++++++++++++++++++++---------
> morecore.c | 10 +++++-----
> pagesize.c | 2 +-
> 11 files changed, 60 insertions(+), 44 deletions(-)
>
> diff --git a/alloc.c b/alloc.c
> index 197c1ce..750b2cb 100644
> --- a/alloc.c
> +++ b/alloc.c
> @@ -103,7 +103,7 @@ void *get_huge_pages(size_t len, ghp_t flags)
> }
>
> /* Fault the region to ensure accesses succeed */
> - if (__lh_hugetlbfs_prefault(heap_fd, buf, len) != 0) {
> + if (hugetlbfs_prefault(heap_fd, buf, len) != 0) {
> munmap(buf, len);
> close(heap_fd);
>
> diff --git a/debug.c b/debug.c
> index bd54d58..e854dff 100644
> --- a/debug.c
> +++ b/debug.c
> @@ -58,7 +58,7 @@ static void __hugetlbfs_init_debug(void)
> initialized = 1;
> }
>
> -void __lh_hugetlbfs_setup_debug(void)
> +void hugetlbfs_setup_debug(void)
> {
> __hugetlbfs_init_debug();
> }
> diff --git a/elflink.c b/elflink.c
> index 75a9dbb..f6a7fb5 100644
> --- a/elflink.c
> +++ b/elflink.c
> @@ -809,7 +809,7 @@ static void check_range_empty(void *addr, unsigned long
> len)
> WARNING("Unable to verify address range %p - %p. Not empty?\n",
> addr, addr + len);
> if (__hugetlbfs_debug)
> - __lh_dump_proc_pid_maps();
> + dump_proc_pid_maps();
> }
> if (p != MAP_FAILED)
> munmap(p, len);
> @@ -1147,7 +1147,7 @@ static int set_hpage_sizes(const char *env)
> continue;
>
> if (*(++pos) == '=') {
> - size = __lh_parse_page_size(pos + 1);
> + size = parse_page_size(pos + 1);
> if (size == -1)
> return size;
> } else
> @@ -1258,7 +1258,7 @@ static int parse_elf()
> return 0;
> }
>
> -void __lh_hugetlbfs_setup_elflink(void)
> +void hugetlbfs_setup_elflink(void)
> {
> int i, ret;
>
> diff --git a/hugeadm.c b/hugeadm.c
> index 4aef40e..cee6aac 100644
> --- a/hugeadm.c
> +++ b/hugeadm.c
> @@ -89,7 +89,7 @@ void pool_list(void)
> int pos;
> int cnt;
>
> - cnt = __lh_hpool_sizes(pools, MAX_POOLS);
> + cnt = hpool_sizes(pools, MAX_POOLS);
> if (cnt < 0) {
> ERROR("unable to obtain pools list");
> exit(EXIT_FAILURE);
> @@ -165,9 +165,9 @@ void pool_adjust(char *cmd, unsigned int counter)
> page_size_str, adjust_str, counter);
>
> /* Convert and validate the page_size. */
> - page_size = __lh_parse_page_size(page_size_str);
> + page_size = parse_page_size(page_size_str);
>
> - cnt = __lh_hpool_sizes(pools, MAX_POOLS);
> + cnt = hpool_sizes(pools, MAX_POOLS);
> if (cnt < 0) {
> ERROR("unable to obtain pools list");
> exit(EXIT_FAILURE);
> @@ -210,7 +210,7 @@ void pool_adjust(char *cmd, unsigned int counter)
> * requested should there be insufficient pages. Check the new
> * value and adjust HUGEPAGES_OC accordingly.
> */
> - __lh_get_pool_size(page_size, &pools[pos]);
> + get_pool_size(page_size, &pools[pos]);
> if (pools[pos].minimum != min) {
> ERROR("failed to set pool minimum to %ld became %ld\n",
> min, pools[pos].minimum);
> @@ -228,7 +228,7 @@ void page_sizes(int all)
> int pos;
> int cnt;
>
> - cnt = __lh_hpool_sizes(pools, MAX_POOLS);
> + cnt = hpool_sizes(pools, MAX_POOLS);
> if (cnt < 0) {
> ERROR("unable to obtain pools list");
> exit(EXIT_FAILURE);
> @@ -259,8 +259,8 @@ int main(int argc, char** argv)
> {0},
> };
>
> - __lh_hugetlbfs_setup_debug();
> - __lh_setup_mounts();
> + hugetlbfs_setup_debug();
> + setup_mounts();
>
Could fix up the whitespace damage here, but no a big issue.
> while (ret != -1) {
> ret = getopt_long(argc, argv, opts, long_opts, &index);
> diff --git a/hugetlbfs.h b/hugetlbfs.h
> index 3f2eb30..c2c88f1 100644
> --- a/hugetlbfs.h
> +++ b/hugetlbfs.h
> @@ -32,7 +32,8 @@ int hugetlbfs_unlinked_fd(void);
> int hugetlbfs_unlinked_fd_for_size(long page_size);
>
> /* Diagnoses/debugging only functions */
> -long __lh_dump_proc_pid_maps(void);
> +#define dump_proc_pid_maps __lh_dump_proc_pid_maps
> +long dump_proc_pid_maps(void);
>
> #define PF_LINUX_HUGETLB 0x100000
>
> diff --git a/hugeutils.c b/hugeutils.c
> index 433e6e8..b9e63ad 100644
> --- a/hugeutils.c
> +++ b/hugeutils.c
> @@ -88,7 +88,7 @@ static inline long size_to_smaller_unit(long size)
> * EINVAL - str could not be parsed or was not greater than zero
> * EOVERFLOW - Overflow when converting from the specified units
> */
> -long __lh_parse_page_size(const char *str)
> +long parse_page_size(const char *str)
> {
> char *pos;
> long size;
> @@ -292,7 +292,7 @@ static void probe_default_hpage_size(void)
> */
> env = getenv("HUGETLB_DEFAULT_PAGE_SIZE");
> if (env && strlen(env) > 0)
> - size = __lh_parse_page_size(env);
> + size = parse_page_size(env);
> else {
> size = file_read_ulong(MEMINFO, "Hugepagesize:");
> size *= 1024; /* convert from kB to B */
> @@ -410,7 +410,7 @@ static void find_mounts(void)
> close(fd);
> }
>
> -void __lh_setup_mounts(void)
> +void setup_mounts(void)
> {
> char *env;
> int do_scan = 1;
> @@ -445,7 +445,7 @@ void __lh_setup_mounts(void)
> debug_show_page_sizes();
> }
>
> -int __lh_get_pool_size(long size, struct hpage_pool *pool)
> +int get_pool_size(long size, struct hpage_pool *pool)
> {
> long nr_over = 0;
> long nr_used = 0;
> @@ -493,7 +493,7 @@ int __lh_get_pool_size(long size, struct hpage_pool *pool)
> return 0;
> }
>
> -int __lh_hpool_sizes(struct hpage_pool *pools, int pcnt)
> +int hpool_sizes(struct hpage_pool *pools, int pcnt)
> {
> long default_size;
> int which = 0;
> @@ -503,7 +503,7 @@ int __lh_hpool_sizes(struct hpage_pool *pools, int pcnt)
> default_size = size_to_smaller_unit(file_read_ulong(MEMINFO,
> "Hugepagesize:"));
> if (default_size >= 0 && which < pcnt)
> - if (__lh_get_pool_size(default_size, &pools[which])) {
> + if (get_pool_size(default_size, &pools[which])) {
> pools[which].is_default = 1;
> which++;
> }
> @@ -523,7 +523,7 @@ int __lh_hpool_sizes(struct hpage_pool *pools, int pcnt)
> if (size < 0 || size == default_size)
> continue;
>
> - if (__lh_get_pool_size(size, &pools[which]))
> + if (get_pool_size(size, &pools[which]))
> which++;
> }
> closedir(dir);
> @@ -538,7 +538,7 @@ int __lh_hpool_sizes(struct hpage_pool *pools, int pcnt)
>
> /*
> * NOTE: This function uses data that is initialized by
> - * __lh_setup_mounts() which is called during libhugetlbfs initialization.
> + * setup_mounts() which is called during libhugetlbfs initialization.
> *
> * returns:
> * on success, size of a huge page in number of bytes
> @@ -744,7 +744,7 @@ int hugetlbfs_unlinked_fd(void)
> }
>
> #define IOV_LEN 64
> -int __lh_hugetlbfs_prefault(int fd, void *addr, size_t length)
> +int hugetlbfs_prefault(int fd, void *addr, size_t length)
> {
> /*
> * The NUMA users of libhugetlbfs' malloc feature are
> @@ -827,7 +827,7 @@ int set_nr_overcommit_hugepages(long pagesize, unsigned
> long val)
> /********************************************************************/
>
> #define MAPS_BUF_SZ 4096
> -long __lh_dump_proc_pid_maps()
> +long dump_proc_pid_maps()
> {
> FILE *f;
> char line[MAPS_BUF_SZ];
> diff --git a/init.c b/init.c
> index f58d34b..f9cd804 100644
> --- a/init.c
> +++ b/init.c
> @@ -21,11 +21,11 @@
>
> static void __attribute__ ((constructor)) setup_libhugetlbfs(void)
> {
> - __lh_hugetlbfs_setup_debug();
> - __lh_setup_mounts();
> - __lh_setup_features();
> + hugetlbfs_setup_debug();
> + setup_mounts();
> + setup_features();
> #ifndef NO_ELFLINK
> - __lh_hugetlbfs_setup_elflink();
> + hugetlbfs_setup_elflink();
> #endif
> - __lh_hugetlbfs_setup_morecore();
> + hugetlbfs_setup_morecore();
> }
> diff --git a/kernel-features.c b/kernel-features.c
> index 577e560..8f105b4 100644
> --- a/kernel-features.c
> +++ b/kernel-features.c
> @@ -199,7 +199,7 @@ int check_features_env_valid(const char *env)
> return 0;
> }
>
> -void __lh_setup_features()
> +void setup_features()
> {
> struct utsname u;
> char *env;
> diff --git a/libhugetlbfs_internal.h b/libhugetlbfs_internal.h
> index e07787f..4d7add7 100644
> --- a/libhugetlbfs_internal.h
> +++ b/libhugetlbfs_internal.h
> @@ -41,17 +41,30 @@
> #define SLICE_HIGH_SHIFT 63
> #endif
>
> +/*
> + * When adding a library local variable externalise the symbol as
> + * normal, plus add a #define of the form below. This define effectively
> + * renames the routine into the local namespace __lh_* which is forced
> + * local in the linker script version.lds.
> + */
> extern int __hugetlbfs_verbose;
> extern int __hugetlbfs_debug;
> extern int __hugetlbfs_prefault;
> -extern void __lh_hugetlbfs_setup_elflink();
> -extern void __lh_hugetlbfs_setup_morecore();
> -extern void __lh_hugetlbfs_setup_debug();
> -extern void __lh_setup_mounts();
> -extern void __lh_setup_features();
> +#define hugetlbfs_setup_elflink __lh_hugetlbfs_setup_elflink
> +extern void hugetlbfs_setup_elflink();
> +#define hugetlbfs_setup_morecore __lh_hugetlbfs_setup_morecore
> +extern void hugetlbfs_setup_morecore();
> +#define hugetlbfs_setup_debug __lh_hugetlbfs_setup_debug
> +extern void hugetlbfs_setup_debug();
> +#define setup_mounts __lh_setup_mounts
> +extern void setup_mounts();
> +#define setup_features __lh_setup_features
> +extern void setup_features();
> extern char __hugetlbfs_hostname[];
> -extern int __lh_hugetlbfs_prefault(int fd, void *addr, size_t length);
> -extern long __lh_parse_page_size(const char *str);
> +#define hugetlbfs_prefault __lh_hugetlbfs_prefault
> +extern int hugetlbfs_prefault(int fd, void *addr, size_t length);
> +#define parse_page_size __lh_parse_page_size
> +extern long parse_page_size(const char *str);
>
> #ifndef REPORT_UTIL
> #define REPORT_UTIL "libhugetlbfs"
> @@ -97,8 +110,10 @@ struct hpage_pool {
> int is_default;
> };
>
> -extern int __lh_hpool_sizes(struct hpage_pool *, int);
> -extern int __lh_get_pool_size(long, struct hpage_pool *);
> +#define hpool_sizes __lh_hpool_sizes
> +extern int hpool_sizes(struct hpage_pool *, int);
> +#define get_pool_size __lh_get_pool_size
> +extern int get_pool_size(long, struct hpage_pool *);
>
> /* Arch-specific callbacks */
> extern int direct_syscall(int sysnum, ...);
> diff --git a/morecore.c b/morecore.c
> index ddcd77d..19d18b8 100644
> --- a/morecore.c
> +++ b/morecore.c
> @@ -108,7 +108,7 @@ static void *hugetlbfs_morecore(ptrdiff_t increment)
> WARNING("Heap originates at %p instead of %p\n",
> p, heapbase);
> if (__hugetlbfs_debug)
> - __lh_dump_proc_pid_maps();
> + dump_proc_pid_maps();
> }
> /* then setup the heap variables */
> heapbase = heaptop = p;
> @@ -118,12 +118,12 @@ static void *hugetlbfs_morecore(ptrdiff_t increment)
> WARNING("New heap segment mapped at %p instead of %p\n",
> p, heapbase + mapsize);
> if (__hugetlbfs_debug)
> - __lh_dump_proc_pid_maps();
> + dump_proc_pid_maps();
> return NULL;
> }
>
> /* Fault the region to ensure accesses succeed */
> - if (__lh_hugetlbfs_prefault(zero_fd, p, delta) != 0) {
> + if (hugetlbfs_prefault(zero_fd, p, delta) != 0) {
> munmap(p, delta);
> return NULL;
> }
> @@ -190,7 +190,7 @@ static void *hugetlbfs_morecore(ptrdiff_t increment)
> return p;
> }
>
> -void __lh_hugetlbfs_setup_morecore(void)
> +void hugetlbfs_setup_morecore(void)
> {
> char *env, *ep;
> unsigned long heapaddr;
> @@ -212,7 +212,7 @@ void __lh_hugetlbfs_setup_morecore(void)
> if (strncasecmp(env, "y", 1) == 0)
> hpage_size = gethugepagesize();
> else
> - hpage_size = __lh_parse_page_size(env);
> + hpage_size = parse_page_size(env);
>
> if (hpage_size <= 0) {
> if (errno == ENOSYS)
> diff --git a/pagesize.c b/pagesize.c
> index aca4de4..11dd68d 100644
> --- a/pagesize.c
> +++ b/pagesize.c
> @@ -80,7 +80,7 @@ int main(int argc, char** argv)
> long pagesizes[MAX_PAGESIZES];
> int i;
>
> - __lh_hugetlbfs_setup_debug();
> + hugetlbfs_setup_debug();
>
Another spaces vs tabs here, but again barely worth getting into a
twist over.
> while (ret != -1) {
> ret = getopt_long(argc, argv, opts, long_opts, &index);
> --
> 1.6.0.2.711.gf1ba4
>
--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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