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| author | Jack Steiner <steiner@sgi.com> | 2008-07-30 07:34:02 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-30 18:41:48 +0200 |
| commit | 9ca8e40c130c906c1060d105e63628410c860261 (patch) | |
| tree | f43ec77a814039d2317c3012810b049c221e14ec /drivers/misc/sgi-gru/grumain.c | |
| parent | GRU Driver: driver/misc Makefile & Kconfig changes (diff) | |
| download | linux-9ca8e40c130c906c1060d105e63628410c860261.tar.xz linux-9ca8e40c130c906c1060d105e63628410c860261.zip | |
GRU Driver V3: fixes to resolve code review comments
Fixes problems identified in a code review:
- add comment with high level dscription of the GRU
- prepend "gru_" to all global names
- delete unused function
- couple of trivial bug fixes
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grumain.c')
| -rw-r--r-- | drivers/misc/sgi-gru/grumain.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c index aef6822cb80e..0eeb8dddd2f5 100644 --- a/drivers/misc/sgi-gru/grumain.c +++ b/drivers/misc/sgi-gru/grumain.c @@ -22,7 +22,7 @@ #include "grutables.h" #include "gruhandles.h" -unsigned long options __read_mostly; +unsigned long gru_options __read_mostly; static struct device_driver gru_driver = { .name = "gru" @@ -163,14 +163,14 @@ static unsigned long reserve_resources(unsigned long *p, int n, int mmax, return bits; } -unsigned long reserve_gru_cb_resources(struct gru_state *gru, int cbr_au_count, +unsigned long gru_reserve_cb_resources(struct gru_state *gru, int cbr_au_count, char *cbmap) { return reserve_resources(&gru->gs_cbr_map, cbr_au_count, GRU_CBR_AU, cbmap); } -unsigned long reserve_gru_ds_resources(struct gru_state *gru, int dsr_au_count, +unsigned long gru_reserve_ds_resources(struct gru_state *gru, int dsr_au_count, char *dsmap) { return reserve_resources(&gru->gs_dsr_map, dsr_au_count, GRU_DSR_AU, @@ -182,10 +182,10 @@ static void reserve_gru_resources(struct gru_state *gru, { gru->gs_active_contexts++; gts->ts_cbr_map = - reserve_gru_cb_resources(gru, gts->ts_cbr_au_count, + gru_reserve_cb_resources(gru, gts->ts_cbr_au_count, gts->ts_cbr_idx); gts->ts_dsr_map = - reserve_gru_ds_resources(gru, gts->ts_dsr_au_count, NULL); + gru_reserve_ds_resources(gru, gts->ts_dsr_au_count, NULL); } static void free_gru_resources(struct gru_state *gru, @@ -416,6 +416,7 @@ static void gru_free_gru_context(struct gru_thread_state *gts) /* * Prefetching cachelines help hardware performance. + * (Strictly a performance enhancement. Not functionally required). */ static void prefetch_data(void *p, int num, int stride) { @@ -746,6 +747,8 @@ again: * gru_nopage * * Map the user's GRU segment + * + * Note: gru segments alway mmaped on GRU_GSEG_PAGESIZE boundaries. */ int gru_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { @@ -757,6 +760,7 @@ int gru_fault(struct vm_area_struct *vma, struct vm_fault *vmf) vma, vaddr, GSEG_BASE(vaddr)); STAT(nopfn); + /* The following check ensures vaddr is a valid address in the VMA */ gts = gru_find_thread_state(vma, TSID(vaddr, vma)); if (!gts) return VM_FAULT_SIGBUS; @@ -775,7 +779,7 @@ again: } if (!gts->ts_gru) { - while (!gru_assign_gru_context(gts)) { + if (!gru_assign_gru_context(gts)) { mutex_unlock(>s->ts_ctxlock); preempt_enable(); schedule_timeout(GRU_ASSIGN_DELAY); /* true hack ZZZ */ |