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Signed-off-by: Yury Norov --- arch/powerpc/mm/book3s32/mmu_context.c | 10 ++--- arch/powerpc/platforms/pasemi/dma_lib.c | 45 +++++----------------- arch/powerpc/platforms/powernv/pci-sriov.c | 12 ++---- 3 files changed, 17 insertions(+), 50 deletions(-) diff --git a/arch/powerpc/mm/book3s32/mmu_context.c b/arch/powerpc/mm/book3s32/mmu_context.c index 1922f9a6b058..7db19f173c2e 100644 --- a/arch/powerpc/mm/book3s32/mmu_context.c +++ b/arch/powerpc/mm/book3s32/mmu_context.c @@ -50,13 +50,11 @@ static unsigned long context_map[LAST_CONTEXT / BITS_PER_LONG + 1]; unsigned long __init_new_context(void) { - unsigned long ctx = next_mmu_context; + unsigned long ctx; - while (test_and_set_bit(ctx, context_map)) { - ctx = find_next_zero_bit(context_map, LAST_CONTEXT+1, ctx); - if (ctx > LAST_CONTEXT) - ctx = 0; - } + ctx = find_and_set_next_bit(context_map, LAST_CONTEXT + 1, next_mmu_context); + if (ctx > LAST_CONTEXT) + ctx = 0; next_mmu_context = (ctx + 1) & LAST_CONTEXT; return ctx; diff --git a/arch/powerpc/platforms/pasemi/dma_lib.c b/arch/powerpc/platforms/pasemi/dma_lib.c index 1be1f18f6f09..906dabee0132 100644 --- a/arch/powerpc/platforms/pasemi/dma_lib.c +++ b/arch/powerpc/platforms/pasemi/dma_lib.c @@ -118,14 +118,9 @@ static int pasemi_alloc_tx_chan(enum pasemi_dmachan_type type) limit = MAX_TXCH; break; } -retry: - bit = find_next_bit(txch_free, MAX_TXCH, start); - if (bit >= limit) - return -ENOSPC; - if (!test_and_clear_bit(bit, txch_free)) - goto retry; - - return bit; + + bit = find_and_clear_next_bit(txch_free, MAX_TXCH, start); + return bit < limit ? bit : -ENOSPC; } static void pasemi_free_tx_chan(int chan) @@ -136,15 +131,9 @@ static void pasemi_free_tx_chan(int chan) static int pasemi_alloc_rx_chan(void) { - int bit; -retry: - bit = find_first_bit(rxch_free, MAX_RXCH); - if (bit >= MAX_TXCH) - return -ENOSPC; - if (!test_and_clear_bit(bit, rxch_free)) - goto retry; - - return bit; + int bit = find_and_clear_bit(rxch_free, MAX_RXCH); + + return bit < MAX_TXCH ? bit : -ENOSPC; } static void pasemi_free_rx_chan(int chan) @@ -374,16 +363,9 @@ EXPORT_SYMBOL(pasemi_dma_free_buf); */ int pasemi_dma_alloc_flag(void) { - int bit; + int bit = find_and_clear_bit(flags_free, MAX_FLAGS); -retry: - bit = find_first_bit(flags_free, MAX_FLAGS); - if (bit >= MAX_FLAGS) - return -ENOSPC; - if (!test_and_clear_bit(bit, flags_free)) - goto retry; - - return bit; + return bit < MAX_FLAGS ? bit : -ENOSPC; } EXPORT_SYMBOL(pasemi_dma_alloc_flag); @@ -439,16 +421,9 @@ EXPORT_SYMBOL(pasemi_dma_clear_flag); */ int pasemi_dma_alloc_fun(void) { - int bit; - -retry: - bit = find_first_bit(fun_free, MAX_FLAGS); - if (bit >= MAX_FLAGS) - return -ENOSPC; - if (!test_and_clear_bit(bit, fun_free)) - goto retry; + int bit = find_and_clear_bit(fun_free, MAX_FLAGS); - return bit; + return bit < MAX_FLAGS ? bit : -ENOSPC; } EXPORT_SYMBOL(pasemi_dma_alloc_fun); diff --git a/arch/powerpc/platforms/powernv/pci-sriov.c b/arch/powerpc/platforms/powernv/pci-sriov.c index 59882da3e742..640e387e6d83 100644 --- a/arch/powerpc/platforms/powernv/pci-sriov.c +++ b/arch/powerpc/platforms/powernv/pci-sriov.c @@ -397,18 +397,12 @@ static int64_t pnv_ioda_map_m64_single(struct pnv_phb *phb, static int pnv_pci_alloc_m64_bar(struct pnv_phb *phb, struct pnv_iov_data *iov) { - int win; + int win = find_and_set_bit(&phb->ioda.m64_bar_alloc, phb->ioda.m64_bar_idx + 1); - do { - win = find_next_zero_bit(&phb->ioda.m64_bar_alloc, - phb->ioda.m64_bar_idx + 1, 0); - - if (win >= phb->ioda.m64_bar_idx + 1) - return -1; - } while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc)); + if (win >= phb->ioda.m64_bar_idx + 1) + return -1; set_bit(win, iov->used_m64_bar_mask); - return win; } -- 2.39.2